X111112112XX1221
X1111121122XX221
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X1X111X112XXX221
X1XX11X1122X1221
X1XX112112XXX221
211111X1122X1221
2111112112XXX221
211X1121122X1221
21X11121122X1221
21XX11X112XX1221
21XX11X1122XX221
