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XX212X21X2111121
X1112XX12112X121
X12112X11221X121
X211X1X122X1XX21
X211X2211X121121
1X1121212X21X121
1X1122X112XX1121
11X1X221221XX121
12X12X112XX21121
12X122X1X111XX21
2XX112211XX1XX21
21X12X21112X1121
21X12111X2X1X121
22111XX1XX211121
2211121121XXX121
