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2X1XX2112X1X1XM1
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2X1XX2111X1221M1
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22XX1X11XX11X2M1
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22XX1X112X1X1XM1
X2X11X1X21XX1XM1
22XX1X111X1221M1
X2X11X1X11X221M1
212X2111XX11X2M1
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212X21112X1X1XM1
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1XX1XX11X21XXXM1
1XX2XX11XX1111M1
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