const A9 = 1
const B9 = 2
const C9 = 3
const D9 = 4
const E9 = 5
const F9 = 6
const G9 = 7
const H9 = 8
const I9 = 9
const A8 = 10
const B8 = 11
const C8 = 12
const D8 = 13
const E8 = 14
const F8 = 15
const G8 = 16
const H8 = 17
const I8 = 18
const A7 = 19
const B7 = 20
const C7 = 21
const D7 = 22
const E7 = 23
const F7 = 24
const G7 = 25
const H7 = 26
const I7 = 27
const A6 = 28
const B6 = 29
const C6 = 30
const D6 = 31
const E6 = 32
const F6 = 33
const G6 = 34
const H6 = 35
const I6 = 36
const A5 = 37
const B5 = 38
const C5 = 39
const D5 = 40
const E5 = 41
const F5 = 42
const G5 = 43
const H5 = 44
const I5 = 45
const A4 = 46
const B4 = 47
const C4 = 48
const D4 = 49
const E4 = 50
const F4 = 51
const G4 = 52
const H4 = 53
const I4 = 54
const A3 = 55
const B3 = 56
const C3 = 57
const D3 = 58
const E3 = 59
const F3 = 60
const G3 = 61
const H3 = 62
const I3 = 63
const A2 = 64
const B2 = 65
const C2 = 66
const D2 = 67
const E2 = 68
const F2 = 69
const G2 = 70
const H2 = 71
const I2 = 72
const A1 = 73
const B1 = 74
const C1 = 75
const D1 = 76
const E1 = 77
const F1 = 78
const G1 = 79
const H1 = 80
const I1 = 81
