mapping.json

{
    "75": 0,
    "78": 1,
    "59": 2,
    "84": 3,
    "_": 4,
    "57": 5,
    "69": 6,
    "66": 7,
    "64": 8,
    "55": 9,
    "83": 10,
    "72": 11,
    "63": 12,
    "77": 13,
    "76": 14,
    "79": 15,
    "70": 16,
    "73": 17,
    "80": 18,
    "68": 19,
    "74": 20,
    "62": 21,
    "/": 22,
    "52": 23,
    "67": 24,
    "58": 25,
    "53": 26,
    "r": 27,
    "81": 28,
    "60": 29,
    "71": 30,
    "65": 31
}