X11XXX11X1221X11
X11XXX1XX1221X11
2111XX11X1221X11
2111XX1XX1221X11
21XXXX11XX221X11
21XXXX1XXX221X11
X1X1XX11X2221X12
X1X1XX1XX2221X12
X121XX11XX221X12
X121XX1XXX221X12
212XXX11X2221X12
212XXX1XX2221X12
