{
  "min": 16,
  "max": 30,
  "aliases": {
    "20": 19,
    "25": 24,
    "J": 16,
    "J-MR1": 17,
    "J-MR2": 18,
    "K": 19,
    "L": 21,
    "L-MR1": 22,
    "M": 23,
    "N": 24,
    "N-MR1": 24,
    "O": 26,
    "O-MR1": 27,
    "P": 28,
    "Q": 29,
    "R": 30
  }
}