output_description: Print the answer to Roger's question as a string consisting of lowercase
  English letters.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N
attempt: a = int(input())
  b = ""
  while a > 0:
      c = a % 26
      if c == 0:
          b = b + "z"
          a = a - 26
      elif c == 1:
          b = b + "a"
          a = a - 1
      elif c == 2:
          b = b + "b"
          a = a - 2
      elif c == 3:
          b = b + "c"
          a = a - 3
      elif c == 4:
          b = b + "d"
          a = a - 4
      elif c == 5:
          b = b + "e"
          a = a - 5
      elif c == 6:
          b = b + "f"
          a = a - 6
      elif c == 7:
          b = b + "g"
          a = a - 7
      elif c == 8:
          b = b + "h"
          a = a - 8
      elif c == 9:
          b = b + "i"
          a = a - 9
      elif c == 10:
          b = b + "j"
          a = a - 10
      elif c == 11:
          b = b + "k"
          a = a - 11
      elif c == 12:
          b = b + "l"
          a = a - 12
      elif c == 13:
          b = b + "m"
          a = a - 13
      elif c == 14:
          b = b + "n"
          a = a - 14
      elif c == 15:
          b = b + "o"
          a = a - 15
      elif c == 16:
          b = b + "p"
          a = a - 16
      elif c == 17:
          b = b + "q"
          a = a - 17
      elif c == 18:
          b = b + "r"
          a = a - 18
      elif c == 19:
          b = b + "s"
          a = a - 19
      elif c == 20:
          b = b + "t"
          a = a - 20
      elif c == 21:
          b = b + "u"
          a = a - 21
      elif c == 22:
          b = b + "v"
          a = a - 22
      elif c == 23:
          b = b + "w"
          a = a - 23
      elif c == 24:
          b = b + "x"
          a = a - 24
      elif c == 25:
          b = b + "y"
          a = a - 25
      a = a / 26
  print(b[::-1])
  
problem_description: Statement
  
  1000000000000001 dogs suddenly appeared under the roof of Roger's house, all
  of which he decided to keep. The dogs had been numbered 1 through
  1000000000000001, but he gave them new names, as follows:
  
    * the dogs numbered 1,2,\cdots,26 were respectively given the names `a`, `b`, ..., `z`;
    * the dogs numbered 27,28,29,\cdots,701,702  were respectively given the names `aa`, `ab`, `ac`, ..., `zy`, `zz`;
    * the dogs numbered 703,704,705,\cdots,18277,18278  were respectively given the names `aaa`, `aab`, `aac`, ..., `zzy`, `zzz`;
    * the dogs numbered 18279,18280,18281,\cdots,475253,475254  were respectively given the names `aaaa`, `aaab`, `aaac`, ..., `zzzy`, `zzzz`;
    * the dogs numbered 475255,475256,\cdots  were respectively given the names `aaaaa`, `aaaab`, ...;
    * and so on.
  
  To sum it up, the dogs numbered 1, 2, \cdots were respectively given the
  following names:
  
  `a`, `b`, ..., `z`, `aa`, `ab`, ..., `az`, `ba`, `bb`, ..., `bz`, ..., `za`,
  `zb`, ..., `zz`, `aaa`, `aab`, ..., `aaz`, `aba`, `abb`, ..., `abz`, ...,
  `zzz`, `aaaa`, ...
  
  Now, Roger asks you:
  
  "What is the name for the dog numbered N?"
samples: [{"input": "2", "output": "b\n    \n\n* * *"}, {"input": "27", "output": "aa\n    \n\n* * *"}, {"input": "123456789", "output": "jjddja"}]