1X11X1X2121X2XM2
1X1XXXX2X21X1XM2
XXX1XXX2121X1XM2
1X11XXX2112X1XM2
1212XXX2221X1XM2
1111XXX2X21X1XM2
111XXXX2121X1XM2
XX11XXX2121X2XM2
1XX1X1X2121X1XM2
XX11X1X2121X1XM2
1XX1XXX2121X2XM2
1X11XXX2211X1XM2
1X11XXX2222X1XM2
1211XXX2122X1XM2
1X12XXX2111X1XM2
1X12XXX2122X1XM2
1211XXX2111X1XM2
