int main(void){
    int i, j;
    int mask;
    for (i = 0; i < 256; i++){
        j = i;
        for(mask = j >> 1 ; mask != 0 ; mask = mask >> 1){
            j ^= mask;
        }
    printf("original %i graydecoded %i\n", i, j);
    }
}

original 0 graydecoded 0
original 1 graydecoded 1
original 2 graydecoded 3
original 3 graydecoded 2
original 4 graydecoded 7
original 5 graydecoded 6
original 6 graydecoded 4
original 7 graydecoded 5
original 8 graydecoded 15
original 9 graydecoded 14
original 10 graydecoded 12
original 11 graydecoded 13
original 12 graydecoded 8
original 13 graydecoded 9
original 14 graydecoded 11
original 15 graydecoded 10
original 16 graydecoded 31
original 17 graydecoded 30
original 18 graydecoded 28
original 19 graydecoded 29
original 20 graydecoded 24
original 21 graydecoded 25
original 22 graydecoded 27
original 23 graydecoded 26
original 24 graydecoded 16
original 25 graydecoded 17
original 26 graydecoded 19
original 27 graydecoded 18
original 28 graydecoded 23
original 29 graydecoded 22
original 30 graydecoded 20
original 31 graydecoded 21
original 32 graydecoded 63
original 33 graydecoded 62
original 34 graydecoded 60
original 35 graydecoded 61
original 36 graydecoded 56
original 37 graydecoded 57
original 38 graydecoded 59
original 39 graydecoded 58
original 40 graydecoded 48
original 41 graydecoded 49
original 42 graydecoded 51
original 43 graydecoded 50
original 44 graydecoded 55
original 45 graydecoded 54
original 46 graydecoded 52
original 47 graydecoded 53
original 48 graydecoded 32
original 49 graydecoded 33
original 50 graydecoded 35
original 51 graydecoded 34
original 52 graydecoded 39
original 53 graydecoded 38
original 54 graydecoded 36
original 55 graydecoded 37
original 56 graydecoded 47
original 57 graydecoded 46
original 58 graydecoded 44
original 59 graydecoded 45
original 60 graydecoded 40
original 61 graydecoded 41
original 62 graydecoded 43
original 63 graydecoded 42
original 64 graydecoded 127
original 65 graydecoded 126
original 66 graydecoded 124
original 67 graydecoded 125
original 68 graydecoded 120
original 69 graydecoded 121
original 70 graydecoded 123
original 71 graydecoded 122
original 72 graydecoded 112
original 73 graydecoded 113
original 74 graydecoded 115
original 75 graydecoded 114
original 76 graydecoded 119
original 77 graydecoded 118
original 78 graydecoded 116
original 79 graydecoded 117
original 80 graydecoded 96
original 81 graydecoded 97
original 82 graydecoded 99
original 83 graydecoded 98
original 84 graydecoded 103
original 85 graydecoded 102
original 86 graydecoded 100
original 87 graydecoded 101
original 88 graydecoded 111
original 89 graydecoded 110
original 90 graydecoded 108
original 91 graydecoded 109
original 92 graydecoded 104
original 93 graydecoded 105
original 94 graydecoded 107
original 95 graydecoded 106
original 96 graydecoded 64
original 97 graydecoded 65
original 98 graydecoded 67
original 99 graydecoded 66
original 100 graydecoded 71
original 101 graydecoded 70
original 102 graydecoded 68
original 103 graydecoded 69
original 104 graydecoded 79
original 105 graydecoded 78
original 106 graydecoded 76
original 107 graydecoded 77
original 108 graydecoded 72
original 109 graydecoded 73
original 110 graydecoded 75
original 111 graydecoded 74
original 112 graydecoded 95
original 113 graydecoded 94
original 114 graydecoded 92
original 115 graydecoded 93
original 116 graydecoded 88
original 117 graydecoded 89
original 118 graydecoded 91
original 119 graydecoded 90
original 120 graydecoded 80
original 121 graydecoded 81
original 122 graydecoded 83
original 123 graydecoded 82
original 124 graydecoded 87
original 125 graydecoded 86
original 126 graydecoded 84
original 127 graydecoded 85
original 128 graydecoded 255
original 129 graydecoded 254
original 130 graydecoded 252
original 131 graydecoded 253
original 132 graydecoded 248
original 133 graydecoded 249
original 134 graydecoded 251
original 135 graydecoded 250
original 136 graydecoded 240
original 137 graydecoded 241
original 138 graydecoded 243
original 139 graydecoded 242
original 140 graydecoded 247
original 141 graydecoded 246
original 142 graydecoded 244
original 143 graydecoded 245
original 144 graydecoded 224
original 145 graydecoded 225
original 146 graydecoded 227
original 147 graydecoded 226
original 148 graydecoded 231
original 149 graydecoded 230
original 150 graydecoded 228
original 151 graydecoded 229
original 152 graydecoded 239
original 153 graydecoded 238
original 154 graydecoded 236
original 155 graydecoded 237
original 156 graydecoded 232
original 157 graydecoded 233
original 158 graydecoded 235
original 159 graydecoded 234
original 160 graydecoded 192
original 161 graydecoded 193
original 162 graydecoded 195
original 163 graydecoded 194
original 164 graydecoded 199
original 165 graydecoded 198
original 166 graydecoded 196
original 167 graydecoded 197
original 168 graydecoded 207
original 169 graydecoded 206
original 170 graydecoded 204
original 171 graydecoded 205
original 172 graydecoded 200
original 173 graydecoded 201
original 174 graydecoded 203
original 175 graydecoded 202
original 176 graydecoded 223
original 177 graydecoded 222
original 178 graydecoded 220
original 179 graydecoded 221
original 180 graydecoded 216
original 181 graydecoded 217
original 182 graydecoded 219
original 183 graydecoded 218
original 184 graydecoded 208
original 185 graydecoded 209
original 186 graydecoded 211
original 187 graydecoded 210
original 188 graydecoded 215
original 189 graydecoded 214
original 190 graydecoded 212
original 191 graydecoded 213
original 192 graydecoded 128
original 193 graydecoded 129
original 194 graydecoded 131
original 195 graydecoded 130
original 196 graydecoded 135
original 197 graydecoded 134
original 198 graydecoded 132
original 199 graydecoded 133
original 200 graydecoded 143
original 201 graydecoded 142
original 202 graydecoded 140
original 203 graydecoded 141
original 204 graydecoded 136
original 205 graydecoded 137
original 206 graydecoded 139
original 207 graydecoded 138
original 208 graydecoded 159
original 209 graydecoded 158
original 210 graydecoded 156
original 211 graydecoded 157
original 212 graydecoded 152
original 213 graydecoded 153
original 214 graydecoded 155
original 215 graydecoded 154
original 216 graydecoded 144
original 217 graydecoded 145
original 218 graydecoded 147
original 219 graydecoded 146
original 220 graydecoded 151
original 221 graydecoded 150
original 222 graydecoded 148
original 223 graydecoded 149
original 224 graydecoded 191
original 225 graydecoded 190
original 226 graydecoded 188
original 227 graydecoded 189
original 228 graydecoded 184
original 229 graydecoded 185
original 230 graydecoded 187
original 231 graydecoded 186
original 232 graydecoded 176
original 233 graydecoded 177
original 234 graydecoded 179
original 235 graydecoded 178
original 236 graydecoded 183
original 237 graydecoded 182
original 238 graydecoded 180
original 239 graydecoded 181
original 240 graydecoded 160
original 241 graydecoded 161
original 242 graydecoded 163
original 243 graydecoded 162
original 244 graydecoded 167
original 245 graydecoded 166
original 246 graydecoded 164
original 247 graydecoded 165
original 248 graydecoded 175
original 249 graydecoded 174
original 250 graydecoded 172
original 251 graydecoded 173
original 252 graydecoded 168
original 253 graydecoded 169
original 254 graydecoded 171
original 255 graydecoded 170

Exited: ExitFailure 29