X21XX112X1XX11M2
1211X112X1X121M2
X21X1X1211XX21M2
1211X212X12X21M2
X21XX212112X21M2
12111X12X1X111M2
X2111X12X12X11M2
121X1112X12121M2
X211X112X1XX21M2
