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  1. s = 'email@mail.ru'
  2. i = s.find('@')
  3.  
  4. print(s[0] + "***" + s[i:])
  5. print(s[0] + (i-1)*'*' + s[i:])
Success #stdin #stdout 0.02s 9104KB
stdin
Standard input is empty
stdout
e***@mail.ru
e****@mail.ru