X12X21X111XX2X20
X12X2111XXXXXX20
X12121XX11X12220
1X2X21XXX1X12220
1X2X211XX121XX20
1X21211XXX212220
1X212111X1X1X220
112X211XX1X1X220
112121XX1X21X220
112121XX11X1XX20
112121X11XX1X220
112121X11XX12220
1121211111X12220
