21X121X1X1211211
X11121221X211211
X1X12X2XXX211211
21X121X22X211211
X12121XXX1X11211
X12121X1X1X11211
21212X2211X11211
21112X211X2X1211
21112X2X21XX1211
212121X12XXX1211
X1112X2211X11211
21X121X1212X1211
