adjacency_lists.json

{
    "0" : [-1, -1, -1, 1, 6, 5],
    "1" : [0, -1, -1, 2, 7, 6],
    "2" : [1, -1, -1, 3, 8, 7],
    "3" : [2, -1, -1, 4, 9, 8],
    "4" : [3, -1, -1, -1, 10, 9],

    "5" : [-1, -1, 0, 6, 12, 11],
    "6" : [5, 0, 1, 7, 13, 12],
    "7" : [6, 1, 2, 8, 14, 13],
    "8" : [7, 2, 3, 9, 15, 14],
    "9" : [8, 3, 4, 10, 16, 15],
    "10" : [9, 4, -1, -1, 17, 16],

    "11" : [-1, -1, 5, 12, 19, 18],
    "12" : [11, 5, 6, 13, 20, 19],
    "13" : [12, 6, 7, 14, 21, 20],
    "14" : [13, 7, 8, 15, 22, 21],
    "15" : [14, 8, 9, 16, 23, 22],
    "16" : [15, 9, 10, 17, 24, 23],
    "17" : [16, 10, -1, -1, 25, 24],

    "18" : [-1, -1, 11, 19, 27, 26],
    "19" : [18, 11, 12, 20, 28, 27],
    "20" : [19, 12, 13, 21, 29, 28],
    "21" : [20, 13, 14, 22, 30, 29],
    "22" : [21, 14, 15, 23, 31, 30],
    "23" : [22, 15, 16, 24, 32, 31],
    "24" : [23, 16, 17, 25, 33, 32],
    "25" : [24, 17, -1, -1, 34, 33],

    "26" : [-1, -1, 18, 27, 35, -1],
    "27" : [26, 18, 19, 28, 36, 35],
    "28" : [27, 19, 20, 29, 37, 36],
    "29" : [28, 20, 21, 30, 38, 37],
    "30" : [29, 21, 22, 31, 39, 38],
    "31" : [30, 22, 23, 32, 40, 39],
    "32" : [31, 23, 24, 33, 41, 40],
    "33" : [32, 24, 25, 34, 42, 41],
    "34" : [33, 25, -1, -1, -1, 42],

    "35" : [-1, 26, 27, 36, 43, -1],
    "36" : [35, 27, 28, 37, 44, 43],
    "37" : [36, 28, 29, 38, 45, 44],
    "38" : [37, 29, 30, 39, 46, 45],
    "39" : [38, 30, 31, 40, 47, 46],
    "40" : [39, 31, 32, 41, 48, 47],
    "41" : [40, 32, 33, 42, 49, 48],
    "42" : [41, 33, 34, -1, -1, 49],

    "43" : [-1, 35, 36, 44, 50, -1],
    "44" : [43, 36, 37, 45, 51, 50],
    "45" : [44, 37, 38, 46, 52, 51],
    "46" : [45, 38, 39, 47, 53, 52],
    "47" : [46, 39, 40, 48, 54, 53],
    "48" : [47, 40, 41, 49, 55, 54],
    "49" : [48, 41, 42, -1, -1, 55],

    "50" : [-1, 43, 44, 51, 56, -1],
    "51" : [50, 44, 45, 52, 57, 56],
    "52" : [51, 45, 46, 53, 58, 57],
    "53" : [52, 46, 47, 54, 59, 58],
    "54" : [53, 47, 48, 55, 60, 59],
    "55" : [54, 48, 49, -1, -1, 60],

    "56" : [-1, 50, 51, 57, -1, -1],
    "57" : [56, 51, 52, 58, -1, -1],
    "58" : [57, 52, 53, 59, -1, -1],
    "59" : [58, 53, 54, 60, -1, -1],
    "60" : [59, 54, 55, -1, -1, -1]
}