201026810427袁志兵's submissions for 1208 排列对称串

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201026810427袁志兵
on Dec. 9, 2010, 2:20 p.m.
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201026810427袁志兵
on Dec. 9, 2010, 2:16 p.m.
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201026810427袁志兵
on Dec. 9, 2010, 2:14 p.m.
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