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  1. entrada = input()
  2.  
  3. letras_unicas = set([i for i in set(list(entrada)) if entrada.count(i) %2 != 0])
  4.  
  5. if len(letras_unicas) > 1:
  6.    print(len(letras_unicas)-1)
  7. else:
  8.    print(0)
Success #stdin #stdout 0.04s 9336KB
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https://ideone.com/U3rY1K
language:
Python 3 (python  3.9.5)
created:
6 years ago
visibility:
public

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