X1X1X1X21X111211
X1X1X122XXX11211
222121X21X111211
22212122XXX11211
22X1X1221X111211
22X1X1X2XXX11211
X12121221X111211
X12121X2XXX11211
2121X1X2XX111211
2121X1221XX11211
X2X121X2XX111211
X2X121221XX11211
21X121X21XX11211
21X12122XX111211
X221X1X21XX11211
X221X122XX111211
