XX1111X212121X1M
X11211X2XXX1121M
X21X1112X112121M
X2121XXX1111121M
1X11X1X21X12121M
111X1XX211X2121M
111X1XX212X1121M
2X121112121X1X1M
2112XXX21X12121M
2112XX1212X21X1M
2112X112X11X1X1M
21121XXXX111121M
