X111X1X11XX1XX11
X111X1X1122XXX11
X111X12X1X2XXX11
X111X12X12X1XX11
X11121XX1X21XX11
X11121XX12XXXX11
X11121211XXXXX11
X11121211221XX11
2111X1XX1XXXXX11
2111X1XX1221XX11
2111X1211X21XX11
2111X12112XXXX11
211121X11X2XXX11
211121X112X1XX11
2111212X1XX1XX11
2111212X122XXX11
