X1212121XX121111
2121X1X1X2X11121
11212X112X12X111
12X1X1X12X121121
11X11X22X1221121
1111XX21X2121111
X2X1X1221112XX11
1X21X2111X12X211
1111X2X21X1X2221
11X11X1X2212X211
