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2111X11211X2X122
211XX11212X2X122
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2112X1X21XX2X122
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21X2X11X1XX2X122
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X1X2X11X11X2X122
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21X1X1XX1XX2X122
21X2X1XX12X2X122
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2112X112XXX2X122
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21X2X1X2X1X2X122
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2112X11XXXX2X122
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