12X111221X21X120
XXX111221121X120
11XX11XX111X1X21
11XX11XX111X1221
11XX11XX11121X21
11XX11XX11121221
11X211XX111X1X21
11X211XX111X1221
11X211XX11121X21
11X211XX11121221
XXX21121211X2X22
22X2112211X11X22
