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lishengo: 22,183 "8 elements in 2 groups"
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lishengo: 22,185 "7 elements in 2 groups"
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lishengo: 22,057
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lishengo: 15557
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lishengo: 14,955
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lishengo: 4,563b
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lishengo: 22,190 "5 elements in 2 groups"