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  1. s = ["A", "C", "G", "T"]
  2.  
  3. lists = s.product(s,s,s)
  4. t = []
  5. lists.each{|i|
  6.   k = i.join()
  7.   if k.include?("AAG")
  8.     t.push(k)
  9.   end
  10. }
  11.  
  12. p t
  13. puts "Count=" + t.length.to_s
Success #stdin #stdout 0.01s 7484KB
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["AAAG", "AAGA", "AAGC", "AAGG", "AAGT", "CAAG", "GAAG", "TAAG"]
Count=8
https://ideone.com/zfUFM5
language:
Ruby (ruby 2.5.5)
created:
11 years ago
visibility:
public

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