X21X1X12XX1X2121
XX111XX2X11X2X21
X21X1X122XX1X121
XX111XX221X1XX21
X21X1X121X221121
XX111XX211221X21
221XX11XXX1X2121
2X11X1XXX11X2X21
221XX11X2XX1X121
2X11X1XX21X1XX21
221XX11X1X221121
2X11X1XX11221X21
121X2211XX1X2121
1X1122X1X11X2X21
121X22112XX1X121
1X1122X121X1XX21
121X22111X221121
1X1122X111221X21
