X121XX21XX12X122
212X212212X21X22
21X12121X212X122
21X1X1X12X121X22
1111XX2X1112X122
11X1XX2XXX12X122
1121XX2X2212X122
X111XX2XX212X122
X1X1XX2X2112X122
X121XX2X1X12X122
2111XX2X2X12X122
21X1XX2X1212X122
2121XX2XX112X122
