XX11111XXX211X20
X21X111X1XXX1121
1X11XX12X1X11120
121XXX12112X1221
X211X11211X11120
1X11X111X1211221
12111X1X1X221220
XX112X1221XX1X21
XX1X2112X1X11120
221X111211211220
11121X121X2X1121
1211X11XX1211X21
