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[[784,2,28]] d ≤
n
784
k
2
d
28
kd²/n
2.0
w
4
X/Z
1
g
0.125
r
2.8284
layers
1
swaps
2132

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Distance

X/Z asymmetry 1 · d_X ≤ 28, d_Z ≤ 28 · w_X = 4, w_Z = 4 (max(d_X,d_Z)/min(d_X,d_Z); each side carries its own earned tier: = certified exact, ≤ witness upper bound)
d_X 28 · witness weight 28 (claimed upper_bound)
witness operator (support, 28 qubits)
[599, 600, 601, 602, 626, 631, 651, 652, 653, 660, 661, 662, 669, 670, 678, 691, 696, 699, 700, 705, 720, 723, 729, 732, 749, 750, 758, 759]
d_Z 28 · witness weight 28 (claimed upper_bound)
witness operator (support, 28 qubits)
[46, 47, 48, 49, 56, 69, 70, 73, 78, 81, 82, 83, 85, 86, 87, 96, 99, 100, 107, 108, 116, 123, 145, 150, 174, 175, 176, 177]
certificate none yet · distance stands as a self-certified upper bound (d ≤)

Diagnostics

computed by the verifier from the parity checks, the layout, and the stored witnesses; shown as evidence, not used for ranking
girth H_X 8 · H_Z 8 (shortest cycle of each side’s Tanner graph; longer is friendlier to belief propagation)
check weights H_X 4 · H_Z 4
qubit degrees H_X 2 · H_Z 2
trapping sets H_X (1,2)×784 (2,2)×2352 (3,2)×7056 (smallest syndrome weight at each size, connected sets of up to 3 qubits)
full (size, syndrome weight): count census for H_X
(1,2): 784 (2,2): 2352 (3,2): 7056 (3,4): 1568
trapping sets H_Z (1,2)×784 (2,2)×2352 (3,2)×7056 (smallest syndrome weight at each size, connected sets of up to 3 qubits)
full (size, syndrome weight): count census for H_Z
(1,2): 784 (2,2): 2352 (3,2): 7056 (3,4): 1568
witness diameter X 28.1603 · Z 27.0 (Euclidean support diameter of the stored distance witnesses in the layout; an upper bound on the exhibited logicals’ spread, not a minimum over all logicals)

Verified 2D layout

as measured by the verifier: every check drawn over the submitted coordinates; the interaction radius is the longest dashed pair
r = 2.828
X checkZ checkqubit site (784)dashed: the pair setting the interaction radiushover a check to isolate its qubits; click to pin — repeated clicks cycle through overlapping checks; click empty space to release
routing cost 2132 nearest-neighbor SWAPs per round in total, at most 3 for one check (heuristic: MST lower bound on the layout, with one lattice step = the minimum qubit spacing 1; not a rank)

Construction & provenance

authors @mathysrennela
provenance submitted through the challenge
novelty novelty not audited
construction Rotated toric code on the periodic 28x28 lattice: all plaquette checks, (i+j) even -> X; distance 28 (cycle lengths).
builds on arXiv:quant-ph/9707021
date 2026-09-20
notes Rotated surface/toric ladder fill: standard topological configuration, distance exact by construction (a row or column of plaquettes is a weight-d logical; none lighter exists). Staged for review; novelty vs the wider literature unverified beyond the cited family origin.
family topological (a tag, not a ranking)
locality 2D-local single (computed from the layout)
weight class weight ≤ 4 (computed)

How this code was found

the research note submitted with this code · raw markdown · all notes

[[784,2,28]] rotated toric code (weight-4, 2D-local single-layer)

Direction & hypothesis

The board's least populated primary-track cell is weight-4 x local-2d-single (175 of 1,126 entries at the time of writing): the surface-code-like regime that most qLDPC families (weight >= 6 checks) cannot reach. The standard topological ladders are only seeded at a few sizes on the board (rotated surface [[L^2,1,L]] at L = 5,7,9,11; rotated toric [[L^2,2,L]] at L = 4,6,8), so the hypothesis was that the missing square sizes extend this cell's Pareto frontier on d, at both k = 1 (surface) and k = 2 (toric).

What was searched

Full enumeration of both rotated ladders under the board's admission caps (n <= 700, or the extended tier n <= 1000 with w <= 8 and d <= 40; w = 4 throughout): every square L with admissible(n, 4, L) true, plus every rectangular (L1, L2) configuration -- 1,270 configurations in total. Each was packaged with the kit's own submit.make_submission (RIS witness search) and passed through the trusted gate verify/validate_candidate.py. The gate's novelty verdict split the enumeration exactly along a structural line: squares advance, rectangles never (each [[L1*L2,1,L2]] is strictly dominated by its own square [[L2^2,1,L2]]: same k, same d, same weight, strictly fewer qubits). Only board-advancing survivors were kept; this PR is one of them.

Evidence trail

  • Witness search (kit surrogate, RIS): <= 3,000 trials/side scaled with n;

    • the lightest logical found on each side has weight 28 (a row or column of plaquettes), matching the exact-by-construction distance.

  • Trusted gate (verify/validate_candidate.py): verify ok, distance not

    • refuted (independent fresh-seed RIS search found nothing lighter), not a board duplicate (fingerprint and WL signature checked against the whole board), and board-advancing in the weight-4 x local-2d-single cell.

  • Claim carried: witness-backed upper bound, d <= 28. The distance is exact

    • by construction (no logical lighter than a minimum non-contractible chain exists on the torus), but it is submitted as an upper bound; a maintainer can run verify/certify.py to upgrade it.

Dead ends

  • Rectangular rotated surface/toric codes: all dominated by their own square

    • (see above) -- generated and gate-checked, then discarded.

  • [[9,1,3]] (dominated by the seeded [[7,1,3]]) and [[8,2,2]] (dominated by

    • [[4,2,2]]): gate-flagged as not board-advancing, discarded.

  • Rotated toric L = 10,12,14: parameter sets already on the board

    • ([[100,2,10]] generalized-bicycle, [[144,2,12]] trivariate-bicycle, [[196,2,14]] bivariate-bicycle), skipped as parameter duplicates.

  • An initial torus layout used a ring fold with a seam gap of 3 grid units,

    • which pushed the measured interaction radius past the single-layer cap for L >= 10 (demoting those codes to local-2d-bilayer). The seeded entries' fold convention (seam gap 1) keeps every plaquette diameter at 2*sqrt(2) for every L; that is what this submission uses.

  • Unrotated surface [[2d^2-2d+1,1,d]] and 2D color codes were attempted for a

    • companion fill but their from-scratch constructions failed self-checks; deferred until built from published constructions.

Tools

GLM 5.3 Flash (Zed coding agent); repo kit only (research/kit/submit.py, verify/validate_candidate.py, qldpc_verify), numpy-only constructions. Constructions were verified bit-for-bit (check-support set equality) against the board's own seeded codes/25-1-5.json (L = 5,7,9) and codes/16-2-4.json (L = 4,6,8) before scaling to new sizes.

Reproduction

Rotated toric code [[L^2,2,L]], L = 28 (even):

  • qubits q = (i, j) -> q = i*L + j on an L x L torus (periodic in both axes);
  • for each (i, j) in {0..L-1}^2 the periodic 2x2 plaquette

    • {(i,j), (i,j+1 mod L), (i+1 mod L, j), (i+1 mod L, j+1 mod L)} is an X check when i+j is even and a Z check when i+j is odd;

  • layout: ring fold per axis, i -> 2i for i < L/2 and i -> 2(L-i)-1 for

    • i >= L/2 (the seeded entries' convention; seam gap 1, so every plaquette has diameter 2*sqrt(2)), single layer. Distance: a non-contractible row or column of plaquettes is a weight-L logical; none lighter exists (cycle lengths of the torus).

Parity checks

X-checks 392 (max weight 4) · Z-checks 392 (max weight 4)
H_X (392 checks, sparse supports)
[0, 1, 28, 29] [2, 3, 30, 31] [4, 5, 32, 33] [6, 7, 34, 35] [8, 9, 36, 37] [10, 11, 38, 39] [12, 13, 40, 41] [14, 15, 42, 43] [16, 17, 44, 45] [18, 19, 46, 47] [20, 21, 48, 49] [22, 23, 50, 51] [24, 25, 52, 53] [26, 27, 54, 55] [29, 30, 57, 58] [31, 32, 59, 60] [33, 34, 61, 62] [35, 36, 63, 64] [37, 38, 65, 66] [39, 40, 67, 68] [41, 42, 69, 70] [43, 44, 71, 72] [45, 46, 73, 74] [47, 48, 75, 76] [49, 50, 77, 78] [51, 52, 79, 80] [53, 54, 81, 82] [28, 55, 56, 83] [56, 57, 84, 85] [58, 59, 86, 87] [60, 61, 88, 89] [62, 63, 90, 91] [64, 65, 92, 93] [66, 67, 94, 95] [68, 69, 96, 97] [70, 71, 98, 99] [72, 73, 100, 101] [74, 75, 102, 103] [76, 77, 104, 105] [78, 79, 106, 107] [80, 81, 108, 109] [82, 83, 110, 111] [85, 86, 113, 114] [87, 88, 115, 116] [89, 90, 117, 118] [91, 92, 119, 120] [93, 94, 121, 122] [95, 96, 123, 124] [97, 98, 125, 126] [99, 100, 127, 128] [101, 102, 129, 130] [103, 104, 131, 132] [105, 106, 133, 134] [107, 108, 135, 136] [109, 110, 137, 138] [84, 111, 112, 139] [112, 113, 140, 141] [114, 115, 142, 143] [116, 117, 144, 145] [118, 119, 146, 147] [120, 121, 148, 149] [122, 123, 150, 151] [124, 125, 152, 153] [126, 127, 154, 155] [128, 129, 156, 157] [130, 131, 158, 159] [132, 133, 160, 161] [134, 135, 162, 163] [136, 137, 164, 165] [138, 139, 166, 167] [141, 142, 169, 170] [143, 144, 171, 172] [145, 146, 173, 174] [147, 148, 175, 176] [149, 150, 177, 178] [151, 152, 179, 180] [153, 154, 181, 182] [155, 156, 183, 184] [157, 158, 185, 186] [159, 160, 187, 188] [161, 162, 189, 190] [163, 164, 191, 192] [165, 166, 193, 194] [140, 167, 168, 195] [168, 169, 196, 197] [170, 171, 198, 199] [172, 173, 200, 201] [174, 175, 202, 203] [176, 177, 204, 205] [178, 179, 206, 207] [180, 181, 208, 209] [182, 183, 210, 211] [184, 185, 212, 213] [186, 187, 214, 215] [188, 189, 216, 217] [190, 191, 218, 219] [192, 193, 220, 221] [194, 195, 222, 223] [197, 198, 225, 226] [199, 200, 227, 228] [201, 202, 229, 230] [203, 204, 231, 232] [205, 206, 233, 234] [207, 208, 235, 236] [209, 210, 237, 238] [211, 212, 239, 240] [213, 214, 241, 242] [215, 216, 243, 244] [217, 218, 245, 246] [219, 220, 247, 248] [221, 222, 249, 250] [196, 223, 224, 251] [224, 225, 252, 253] [226, 227, 254, 255] [228, 229, 256, 257] [230, 231, 258, 259] [232, 233, 260, 261] [234, 235, 262, 263] [236, 237, 264, 265] [238, 239, 266, 267] [240, 241, 268, 269] [242, 243, 270, 271] [244, 245, 272, 273] [246, 247, 274, 275] [248, 249, 276, 277] [250, 251, 278, 279] [253, 254, 281, 282] [255, 256, 283, 284] [257, 258, 285, 286] [259, 260, 287, 288] [261, 262, 289, 290] [263, 264, 291, 292] [265, 266, 293, 294] [267, 268, 295, 296] [269, 270, 297, 298] [271, 272, 299, 300] [273, 274, 301, 302] [275, 276, 303, 304] [277, 278, 305, 306] [252, 279, 280, 307] [280, 281, 308, 309] [282, 283, 310, 311] [284, 285, 312, 313] [286, 287, 314, 315] [288, 289, 316, 317] [290, 291, 318, 319] [292, 293, 320, 321] [294, 295, 322, 323] [296, 297, 324, 325] [298, 299, 326, 327] [300, 301, 328, 329] [302, 303, 330, 331] [304, 305, 332, 333] [306, 307, 334, 335] [309, 310, 337, 338] [311, 312, 339, 340] [313, 314, 341, 342] [315, 316, 343, 344] [317, 318, 345, 346] [319, 320, 347, 348] [321, 322, 349, 350] [323, 324, 351, 352] [325, 326, 353, 354] [327, 328, 355, 356] [329, 330, 357, 358] [331, 332, 359, 360] [333, 334, 361, 362] [308, 335, 336, 363] [336, 337, 364, 365] [338, 339, 366, 367] [340, 341, 368, 369] [342, 343, 370, 371] [344, 345, 372, 373] [346, 347, 374, 375] [348, 349, 376, 377] [350, 351, 378, 379] [352, 353, 380, 381] [354, 355, 382, 383] [356, 357, 384, 385] [358, 359, 386, 387] [360, 361, 388, 389] [362, 363, 390, 391] [365, 366, 393, 394] [367, 368, 395, 396] [369, 370, 397, 398] [371, 372, 399, 400] [373, 374, 401, 402] [375, 376, 403, 404] [377, 378, 405, 406] [379, 380, 407, 408] [381, 382, 409, 410] [383, 384, 411, 412] [385, 386, 413, 414] [387, 388, 415, 416] [389, 390, 417, 418] [364, 391, 392, 419] [392, 393, 420, 421] [394, 395, 422, 423] [396, 397, 424, 425] [398, 399, 426, 427] [400, 401, 428, 429] [402, 403, 430, 431] [404, 405, 432, 433] [406, 407, 434, 435] [408, 409, 436, 437] [410, 411, 438, 439] [412, 413, 440, 441] [414, 415, 442, 443] [416, 417, 444, 445] [418, 419, 446, 447] [421, 422, 449, 450] [423, 424, 451, 452] [425, 426, 453, 454] [427, 428, 455, 456] [429, 430, 457, 458] [431, 432, 459, 460] [433, 434, 461, 462] [435, 436, 463, 464] [437, 438, 465, 466] [439, 440, 467, 468] [441, 442, 469, 470] [443, 444, 471, 472] [445, 446, 473, 474] [420, 447, 448, 475] [448, 449, 476, 477] [450, 451, 478, 479] [452, 453, 480, 481] [454, 455, 482, 483] [456, 457, 484, 485] [458, 459, 486, 487] [460, 461, 488, 489] [462, 463, 490, 491] [464, 465, 492, 493] [466, 467, 494, 495] [468, 469, 496, 497] [470, 471, 498, 499] [472, 473, 500, 501] [474, 475, 502, 503] [477, 478, 505, 506] [479, 480, 507, 508] [481, 482, 509, 510] [483, 484, 511, 512] [485, 486, 513, 514] [487, 488, 515, 516] [489, 490, 517, 518] [491, 492, 519, 520] [493, 494, 521, 522] [495, 496, 523, 524] [497, 498, 525, 526] [499, 500, 527, 528] [501, 502, 529, 530] [476, 503, 504, 531] [504, 505, 532, 533] [506, 507, 534, 535] [508, 509, 536, 537] [510, 511, 538, 539] [512, 513, 540, 541] [514, 515, 542, 543] [516, 517, 544, 545] [518, 519, 546, 547] [520, 521, 548, 549] [522, 523, 550, 551] [524, 525, 552, 553] [526, 527, 554, 555] [528, 529, 556, 557] [530, 531, 558, 559] [533, 534, 561, 562] [535, 536, 563, 564] [537, 538, 565, 566] [539, 540, 567, 568] [541, 542, 569, 570] [543, 544, 571, 572] [545, 546, 573, 574] [547, 548, 575, 576] [549, 550, 577, 578] [551, 552, 579, 580] [553, 554, 581, 582] [555, 556, 583, 584] [557, 558, 585, 586] [532, 559, 560, 587] [560, 561, 588, 589] [562, 563, 590, 591] [564, 565, 592, 593] [566, 567, 594, 595] [568, 569, 596, 597] [570, 571, 598, 599] [572, 573, 600, 601] [574, 575, 602, 603] [576, 577, 604, 605] [578, 579, 606, 607] [580, 581, 608, 609] [582, 583, 610, 611] [584, 585, 612, 613] [586, 587, 614, 615] [589, 590, 617, 618] [591, 592, 619, 620] [593, 594, 621, 622] [595, 596, 623, 624] [597, 598, 625, 626] [599, 600, 627, 628] [601, 602, 629, 630] [603, 604, 631, 632] [605, 606, 633, 634] [607, 608, 635, 636] [609, 610, 637, 638] [611, 612, 639, 640] [613, 614, 641, 642] [588, 615, 616, 643] [616, 617, 644, 645] [618, 619, 646, 647] [620, 621, 648, 649] [622, 623, 650, 651] [624, 625, 652, 653] [626, 627, 654, 655] [628, 629, 656, 657] [630, 631, 658, 659] [632, 633, 660, 661] [634, 635, 662, 663] [636, 637, 664, 665] [638, 639, 666, 667] [640, 641, 668, 669] [642, 643, 670, 671] [645, 646, 673, 674] [647, 648, 675, 676] [649, 650, 677, 678] [651, 652, 679, 680] [653, 654, 681, 682] [655, 656, 683, 684] [657, 658, 685, 686] [659, 660, 687, 688] [661, 662, 689, 690] [663, 664, 691, 692] [665, 666, 693, 694] [667, 668, 695, 696] [669, 670, 697, 698] [644, 671, 672, 699] [672, 673, 700, 701] [674, 675, 702, 703] [676, 677, 704, 705] [678, 679, 706, 707] [680, 681, 708, 709] [682, 683, 710, 711] [684, 685, 712, 713] [686, 687, 714, 715] [688, 689, 716, 717] [690, 691, 718, 719] [692, 693, 720, 721] [694, 695, 722, 723] [696, 697, 724, 725] [698, 699, 726, 727] [701, 702, 729, 730] [703, 704, 731, 732] [705, 706, 733, 734] [707, 708, 735, 736] [709, 710, 737, 738] [711, 712, 739, 740] [713, 714, 741, 742] [715, 716, 743, 744] [717, 718, 745, 746] [719, 720, 747, 748] [721, 722, 749, 750] [723, 724, 751, 752] [725, 726, 753, 754] [700, 727, 728, 755] [728, 729, 756, 757] [730, 731, 758, 759] [732, 733, 760, 761] [734, 735, 762, 763] [736, 737, 764, 765] [738, 739, 766, 767] [740, 741, 768, 769] [742, 743, 770, 771] [744, 745, 772, 773] [746, 747, 774, 775] [748, 749, 776, 777] [750, 751, 778, 779] [752, 753, 780, 781] [754, 755, 782, 783] [1, 2, 757, 758] [3, 4, 759, 760] [5, 6, 761, 762] [7, 8, 763, 764] [9, 10, 765, 766] [11, 12, 767, 768] [13, 14, 769, 770] [15, 16, 771, 772] [17, 18, 773, 774] [19, 20, 775, 776] [21, 22, 777, 778] [23, 24, 779, 780] [25, 26, 781, 782] [0, 27, 756, 783]
H_Z (392 checks, sparse supports)
[1, 2, 29, 30] [3, 4, 31, 32] [5, 6, 33, 34] [7, 8, 35, 36] [9, 10, 37, 38] [11, 12, 39, 40] [13, 14, 41, 42] [15, 16, 43, 44] [17, 18, 45, 46] [19, 20, 47, 48] [21, 22, 49, 50] [23, 24, 51, 52] [25, 26, 53, 54] [0, 27, 28, 55] [28, 29, 56, 57] [30, 31, 58, 59] [32, 33, 60, 61] [34, 35, 62, 63] [36, 37, 64, 65] [38, 39, 66, 67] [40, 41, 68, 69] [42, 43, 70, 71] [44, 45, 72, 73] [46, 47, 74, 75] [48, 49, 76, 77] [50, 51, 78, 79] [52, 53, 80, 81] [54, 55, 82, 83] [57, 58, 85, 86] [59, 60, 87, 88] [61, 62, 89, 90] [63, 64, 91, 92] [65, 66, 93, 94] [67, 68, 95, 96] [69, 70, 97, 98] [71, 72, 99, 100] [73, 74, 101, 102] [75, 76, 103, 104] [77, 78, 105, 106] [79, 80, 107, 108] [81, 82, 109, 110] [56, 83, 84, 111] [84, 85, 112, 113] [86, 87, 114, 115] [88, 89, 116, 117] [90, 91, 118, 119] [92, 93, 120, 121] [94, 95, 122, 123] [96, 97, 124, 125] [98, 99, 126, 127] [100, 101, 128, 129] [102, 103, 130, 131] [104, 105, 132, 133] [106, 107, 134, 135] [108, 109, 136, 137] [110, 111, 138, 139] [113, 114, 141, 142] [115, 116, 143, 144] [117, 118, 145, 146] [119, 120, 147, 148] [121, 122, 149, 150] [123, 124, 151, 152] [125, 126, 153, 154] [127, 128, 155, 156] [129, 130, 157, 158] [131, 132, 159, 160] [133, 134, 161, 162] [135, 136, 163, 164] [137, 138, 165, 166] [112, 139, 140, 167] [140, 141, 168, 169] [142, 143, 170, 171] [144, 145, 172, 173] [146, 147, 174, 175] [148, 149, 176, 177] [150, 151, 178, 179] [152, 153, 180, 181] [154, 155, 182, 183] [156, 157, 184, 185] [158, 159, 186, 187] [160, 161, 188, 189] [162, 163, 190, 191] [164, 165, 192, 193] [166, 167, 194, 195] [169, 170, 197, 198] [171, 172, 199, 200] [173, 174, 201, 202] [175, 176, 203, 204] [177, 178, 205, 206] [179, 180, 207, 208] [181, 182, 209, 210] [183, 184, 211, 212] [185, 186, 213, 214] [187, 188, 215, 216] [189, 190, 217, 218] [191, 192, 219, 220] [193, 194, 221, 222] [168, 195, 196, 223] [196, 197, 224, 225] [198, 199, 226, 227] [200, 201, 228, 229] [202, 203, 230, 231] [204, 205, 232, 233] [206, 207, 234, 235] [208, 209, 236, 237] [210, 211, 238, 239] [212, 213, 240, 241] [214, 215, 242, 243] [216, 217, 244, 245] [218, 219, 246, 247] [220, 221, 248, 249] [222, 223, 250, 251] [225, 226, 253, 254] [227, 228, 255, 256] [229, 230, 257, 258] [231, 232, 259, 260] [233, 234, 261, 262] [235, 236, 263, 264] [237, 238, 265, 266] [239, 240, 267, 268] [241, 242, 269, 270] [243, 244, 271, 272] [245, 246, 273, 274] [247, 248, 275, 276] [249, 250, 277, 278] [224, 251, 252, 279] [252, 253, 280, 281] [254, 255, 282, 283] [256, 257, 284, 285] [258, 259, 286, 287] [260, 261, 288, 289] [262, 263, 290, 291] [264, 265, 292, 293] [266, 267, 294, 295] [268, 269, 296, 297] [270, 271, 298, 299] [272, 273, 300, 301] [274, 275, 302, 303] [276, 277, 304, 305] [278, 279, 306, 307] [281, 282, 309, 310] [283, 284, 311, 312] [285, 286, 313, 314] [287, 288, 315, 316] [289, 290, 317, 318] [291, 292, 319, 320] [293, 294, 321, 322] [295, 296, 323, 324] [297, 298, 325, 326] [299, 300, 327, 328] [301, 302, 329, 330] [303, 304, 331, 332] [305, 306, 333, 334] [280, 307, 308, 335] [308, 309, 336, 337] [310, 311, 338, 339] [312, 313, 340, 341] [314, 315, 342, 343] [316, 317, 344, 345] [318, 319, 346, 347] [320, 321, 348, 349] [322, 323, 350, 351] [324, 325, 352, 353] [326, 327, 354, 355] [328, 329, 356, 357] [330, 331, 358, 359] [332, 333, 360, 361] [334, 335, 362, 363] [337, 338, 365, 366] [339, 340, 367, 368] [341, 342, 369, 370] [343, 344, 371, 372] [345, 346, 373, 374] [347, 348, 375, 376] [349, 350, 377, 378] [351, 352, 379, 380] [353, 354, 381, 382] [355, 356, 383, 384] [357, 358, 385, 386] [359, 360, 387, 388] [361, 362, 389, 390] [336, 363, 364, 391] [364, 365, 392, 393] [366, 367, 394, 395] [368, 369, 396, 397] [370, 371, 398, 399] [372, 373, 400, 401] [374, 375, 402, 403] [376, 377, 404, 405] [378, 379, 406, 407] [380, 381, 408, 409] [382, 383, 410, 411] [384, 385, 412, 413] [386, 387, 414, 415] [388, 389, 416, 417] [390, 391, 418, 419] [393, 394, 421, 422] [395, 396, 423, 424] [397, 398, 425, 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Code ID 784-2-28 · download JSON · raw on GitHub