X12X11X2X1X2X122
2X12X11X2X1X1222
X1X221X22112XX22
X11X21X21X121XM1
X21X112X21X21XM1
211XX121XXX212M1
2X11X21X11X21XM1
1X12XX121X2211M1
121X21X2X1X21XM1
