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  1. import itertools
  2. c = 0
  3. for s in itertools.permutations('aaabbcc'):
  4.     s0 = s[0]
  5.     for s1 in s[1:]:
  6.         if s0 == s1:
  7.             break
  8.         s0 = s1
  9.     else:
  10.         c += 1
  11. print(c)
  12.  
Success #stdin #stdout 0.09s 8888KB
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https://ideone.com/7eUFkA
language:
Python (cpython 2.7.16)
created:
11 years ago
visibility:
public

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