X1111X112X212121
X11112X1X1X1X121
X11X1XX121X1X121
X11X1211XX212121
X1X11XX1XX212121
X1X1121121X1X121
X1XX1X11X1X1X121
X1XX12X12X212121
21111X11X1X1X121
211112X12X212121
211X1XX1XX212121
211X121121X1X121
21X11XX121X1X121
21X11211XX212121
21XX1X112X212121
21XX12X1X1X1X121
