X12X11X211122121
11X2X11211122121
X121X1X221122121
11X111X221112121
112X111221112121
X1X2111221112121
11X1111211122221
X12211X221122221
11XXX11221122221
1122X1X211112221
X1XXX1X211112221
X121X11211112221
