21X121X111X11211
21X121X1XX211211
21212X2211X11211
21212X22XX211211
21212XX1X1X11211
21212XX11X211211
21X12122X1X11211
21X121221X211211
212121211XX11211
21212121X1211211
21X12XX21XX11211
21X12XX2X1211211
212121X211211211
212121X2XXX11211
21X12X2111211211
21X12X21XXX11211
