211X111111212121
21X21X1XXX212110
21X2111111212X21
211X1X1XXX212X21
21XX1X1X1121X121
21121111XXX12111
X1211XX1X1212111
X1XX111X1X212111
211211X22X21X111
21XX1XXX11X12112
X1121X11X121XX12
X112121X12X12110
21XX1211X2X1X112
212111XXX1212X12
21X21XX11X212X10
