output_description: If all the characters in S are different, print `yes` (case-sensitive);
  otherwise, print `no`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      S
attempt: s=list(input())
  s.sort()
  j=0
  if len(s) == 1:j=0
  else: j=1
  for i in s:
      if j == len(s)-1:print("yes")
          break
      if i == s[j]:print("no")
          break
      j+=1
problem_description: Statement
  
  You are given a string S consisting of lowercase English letters. Determine
  whether all the characters in S are different.
samples: [{"input": "uncopyrightable", "output": "yes\n    \n\n* * *"}, {"input": "different", "output": "no\n    \n\n* * *"}, {"input": "no", "output": "yes"}]