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