1X1X111XXX1XX121
1X1X111X2X1X2X21
121211X2XX1XX121
121211X22X1X2X21
1212111X2X1XX121
1212111XXX1X2X21
1X1X11X22X1XX121
1X1X11X2XX1X2X21
121X11XXXX1X2121
121X11XX2X1XXX21
1X121112XX1X2121
1X1211122X1XXX21
121X1112XX1XXX21
121X11122X1X2121
1X1211XXXX1XXX21
1X1211XX2X1X2121
