output_description: If \alpha is uppercase, print `A`; if it is lowercase, print `a`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      α
attempt: S = lambda: input()
  I = lambda: int(input())
  L = lambda: list(map(int, input().split()))
  LS = lambda: list(map(str, input().split()))
  
  a = S()
  print("A" if a.isupper() else "a")
  
problem_description: Statement
  
  An uppercase or lowercase English letter \alpha will be given as input. If
  \alpha is uppercase, print `A`; if it is lowercase, print `a`.
samples: [{"input": "B", "output": "A\n    \n\n`B` is uppercase, so we should print `A`.\n\n* * *"}, {"input": "a", "output": "a\n    \n\n`a` is lowercase, so we should print `a`."}]