X1X11XX21XX2X222
X1X1122211X11122
X1X1XX221XX11122
X1X1X2X211X2X222
X1211X2211X2X222
X12112X21XX11122
X121XXX211X11122
X121X2221XX2X222
21X11XX211X11122
21X112221XX2X222
21X1XX2211X2X222
21X1X2X21XX11122
21211X221XX11122
212112X211X2X222
2121XXX21XX2X222
2121X22211X11122
