X2X1X212XX1121M2
12XX2111X12121M2
12X21X1121X121M2
X2X2X1X111212122
X212111X12XX21M2
221X2111XX212122
221X111X121121M2
1211X112221X2122
1211211X121X2122
1211X111XX2121M2
