X1X1X1X2X1112X11
1111X11XXX111211
1111X11XX211X111
X1X1XXX2X1111111
1111XX1XXX11XX11
X1X1XXX2XX11XX11
X1X1XXX2X2112211
1111X21XX111X211
1111X21XXX112111
X1X1X2X2X2111X11
