111X11X2112X1X11
111211X2XX2X1X11
11XX11XXX12X1X11
11X211XX1X2X1X11
121X11XX1XXX1X12
121211XXX1XX1X12
12XX11X2XXXX1X12
12X211X211XX1X12
X11211XX11221X21
X1XX11X21X221X21
X21X11X2X1X21X21
X2X211XXXXX21X21
2X1X11XXXX111X22
2X1211X21X111X22
2XXX11XX11111X22
2XX211X2X1111X22
