111X211211121X20
1111111211121X20
211X2112X1121X20
21111112X1121X20
2111211211X21X20
2X11211211X21X20
2X112X1211111X20
2111211211X11X20
211X1X1211121120
11112X12X1121120
2X1X111211111120
1X112112X1111120
