121X121111211112
X211121111211112
X21X12111121X212
1211121111212X12
1211X21111211112
X21XX21111211112
121XX2111121XX12
X211X2111121XX12
121XX21111212212
X211X21111212212
X21X221111211X12
1211221111211212
121122111121X112
121122111121X212
X21X221111212112
X21X221111212X12
