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  1. s=input().split(' ')
  2. print(' '.join(e for i,e in enumerate(s)if e not in s[:i]))
Success #stdin #stdout 0.02s 9936KB
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stdin
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cat dog cat dog bird dog Snake snake Snake
stdout
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cat dog bird Snake snake
https://ideone.com/mTZrPM
language:
Python 3 (python  3.9.5)
created:
8 years ago
visibility:
public

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