2121X11X1X111121
2121X112X2111121
2X2X2X1X1X111121
2X2X2X12X2111121
2X2XX1121X111121
2X2XX11XX2111121
21212X121X111121
21212X1XX2111121
2X21211XXX111121
2X21211212111121
212XXX1XXX111121
212XXX1212111121
2X21XX1X12111121
2X21XX12XX111121
212X211X12111121
212X2112XX111121
