x0 = 0
x1 = 1
x2 = x0 + x1
x3 = x1 + x2
x4 = x2 + x3
x5 = x3 + x4
x6 = x4 + x5
x7 = x5 + x6
x8 = x6 + x7
x9 = x7 + x8
x10 = x8 + x9
x11 = x9 + x10
x12 = x10 + x11
x13 = x11 + x12
x14 = x12 + x13
x15 = x13 + x14
x16 = x14 + x15
x17 = x15 + x16
x18 = x16 + x17
x19 = x17 + x18
x20 = x18 + x19
x21 = x19 + x20
x22 = x20 + x21
x23 = x21 + x22
x24 = x22 + x23
x25 = x23 + x24
x26 = x24 + x25
x27 = x25 + x26
x28 = x26 + x27
x29 = x27 + x28
x30 = x28 + x29
x31 = x29 + x30
x32 = x30 + x31
x33 = x31 + x32
x34 = x32 + x33
x35 = x33 + x34
x36 = x34 + x35
x37 = x35 + x36
x38 = x36 + x37
x39 = x37 + x38
x40 = x38 + x39
x41 = x39 + x40
x42 = x40 + x41
x43 = x41 + x42
x44 = x42 + x43
x45 = x43 + x44
x46 = x44 + x45
x47 = x45 + x46
x48 = x46 + x47
x49 = x47 + x48
x50 = x48 + x49
x51 = x49 + x50
x52 = x50 + x51
x53 = x51 + x52
x54 = x52 + x53
x55 = x53 + x54
x56 = x54 + x55
x57 = x55 + x56
x58 = x56 + x57
x59 = x57 + x58
x60 = x58 + x59
x61 = x59 + x60
x62 = x60 + x61
x63 = x61 + x62
x64 = x62 + x63
x65 = x63 + x64
x66 = x64 + x65
x67 = x65 + x66
x68 = x66 + x67
x69 = x67 + x68
x70 = x68 + x69
x71 = x69 + x70
x72 = x70 + x71
x73 = x71 + x72
x74 = x72 + x73
x75 = x73 + x74
x76 = x74 + x75
x77 = x75 + x76
x78 = x76 + x77
x79 = x77 + x78
x80 = x78 + x79
x81 = x79 + x80
x82 = x80 + x81
x83 = x81 + x82
x84 = x82 + x83
x85 = x83 + x84
x86 = x84 + x85
x87 = x85 + x86
x88 = x86 + x87
x89 = x87 + x88
x90 = x88 + x89
x91 = x89 + x90
x92 = x90 + x91
x93 = x91 + x92
x94 = x92 + x93
x95 = x93 + x94
x96 = x94 + x95
x97 = x95 + x96
x98 = x96 + x97
x99 = x97 + x98