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: n = int(input())
  c = 0
  n1 = 0
  n1 += n
  for i in range(1, 12):
      a = n1 - 26 ** (i)
      c += 1
      if a <= 0:
          break
      n1 = n1 - 26 ** (i)
  a = ""
  for i in range(c):
      if n // 26 ** (c - i - 1) >= 26:
          alpha = 26
          n = n - 26 ** (c - i)
      else:
          alpha = n // 26 ** (c - i - 1)
          n = n % 26 ** (c - i - 1)
      a += chr(96 + alpha)
  print(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`."}]