2013-04-10 21:29:02 -07:00
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given = %w{
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ABCD CABD ACDB DACB BCDA ACBD ADCB CDAB DABC BCAD CADB CDBA
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CBAD ABDC ADBC BDCA DCBA BACD BADC BDAC CBDA DBCA DCAB
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}
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2015-02-20 00:35:01 -05:00
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all = given[0].chars.permutation.collect(&:join)
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2013-04-10 21:29:02 -07:00
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2015-02-20 00:35:01 -05:00
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puts "missing: #{all - given}"
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