121X12111X211212
X21X121X1X211212
12111211122X1212
X211121X122X1212
X21XX21111211212
1211X21X1X2XX212
X211X2111X2X2212
121XX21X1221X212
X21XX21112212212
X21122111121X212
X21X2211112XX212
1211221X11212212
121X221X112X2212
