X1X11X11X2X21122
X121XX12XXX21122
X12X1X11XXX2X122
21X1XX12X2121122
21XXXX11XX12X122
212X1X12X212X122
X1XX1XX2XX121122
X1XXXXX2X2X2X122
X121XXX1X212X122
21X11XX2XXX2X122
21211XX1XX121122
212XXXX1X2X21122
X1X11X22XX12X122
X1X1XX21XXX21122
X1211X22X2X21122
X12XXX21X2121122
21XX1X21X212X122
21XX1X22XXX21122
2121XX21X2X2X122
212XXX22XX12X122
