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X1211X111X1X1220
XXX11X111212X220
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2121111112121220
2121111X1X1XXX20
2XX1111X12121X20
2X211X11121XXX20
X121XX1XX2121X20
XX21X111XX12XX20
21X1XX1XX21XX220
2XX1X111XX1X1220
X1X1X111221X1X20
XX21X11X221XX220
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2X21XX1X2X121220
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21X12X11XX121X20
2X212X1XXX12X220
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21X12X1X221X1220
2XX121112X1XX220
