21X12111X12X21M2
12X1212X21121222
2111X2222212X110
11112XX21X1X11M2
21XXX1XX2211111M
XX22112X2X112121
X11121122X1X1XM2
112X211121X1X1M1
1112X11211121X12
11XX12X22X1X2121
