2XX1X2111X112221
1211X2X1X2XX1221
X221221X1XX1X221
1211X21X12112X21
X2X1221X2X11XX21
XX1112X12X1X1221
XX21X2112X111221
1X11X2112X1X1221
1221X2X1X2111221
21X1221X21121121
2X11121X12XX1221
221122XX2122XX21
X221221X2111XX21
12112212221X1X21
X111221X2111XX21
1211X2X12121XX21
