1X121XX11XX1X121
2X1X2XX121X1X221
221X1X1121XX2121
121X2XXX21XX2221
2X121X1X1XX1X121
1X1X1X1221X1X121
12122X121XXX2221
22121XX21XXX2121
X21121X22212XX20
X2X12112XX11XX21
X21XX21211121221
12121XX11121X221
121X11X211X1X121
121XX1XX21X12X21
