11X21X112111X121
11X2X1X1X111X121
112211112XX12121
21X211112111X121
21X2XXX1XXX12121
2122XXX1X111X121
2122XXX1XXX12121
X1X2X11121212121
X1221X11XXXX2121
21X2X11121212121
21221X11XXXX2121
