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  1. *s,=input().replace('[?]','*');print(*[('a','A')[i==0 or s[i-2]in'.?!']+'n'*(s[i+2]in 'aeiouAEIOU')if c=='*'else c for i,c in enumerate(s)],sep='')
  2.  
Success #stdin #stdout 0s 9992KB
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[?] apple [?] day keeps the doctor away. [?] lie.
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An apple a day keeps the doctor away. A lie.
https://ideone.com/XO9QLt
language:
Python 3 (python  3.9.5)
created:
7 years ago
visibility:
public

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