21X21X211X2X2111
21XX212121XX2111
2XX211X112X12X11
X122X1211X2X2111
X1X221X12X1X2111
X122X111X211X211
X12212X112XX2111
21X2XX11X2112X11
2112XXX112X1X211
X12212X11XX22111
2112X1X112XX2211
21X221X112XX2111
21X2X12112XX2211
X12X12211X12X111
11X2X221121XX211
21XX2121XX122111
1X22XX2112X2X111
