1112111212111121
1X1X1112X2111XM2
1111XXXX2XX1111M
1X111X1XX21111M2
111X211112X11XMM
111XX12X12XX1X22
XX111XX2X221X121
XX12X112X2X111M1
22XX22XX222X2221
1X1X112222211122
