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: x = int(input())
  
  a1 = x % 26
  a2 = (x // 26) % 26
  a3 = (x // 26 // 26) % 26
  a4 = (x // 26 // 26 // 26) % 26
  a5 = (x // 26 // 26 // 26 // 26) % 26
  a6 = (x // 26 // 26 // 26 // 26 // 26) % 26
  a7 = (x // 26 // 26 // 26 // 26 // 26 // 26) % 26
  a8 = (x // 26 // 26 // 26 // 26 // 26 // 26 // 26) % 26
  a9 = (x // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26) % 26
  a10 = (x // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26) % 26
  a11 = (x // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26) % 26
  a12 = (x // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26) % 26
  a13 = (x // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26 // 26) % 26
  
  l = "abcdefghijklmnopqrstuvwxyz"
  r = ""
  
  if a13 != 0:
      r += l[a13 - 1]
  if a12 != 0:
      r += l[a12 - 1]
  if a11 != 0:
      r += l[a11 - 1]
  if a10 != 0:
      r += l[a10 - 1]
  if a9 != 0:
      r += l[a9 - 1]
  if a8 != 0:
      r += l[a8 - 1]
  if a7 != 0:
      r += l[a7 - 1]
  if a6 != 0:
      r += l[a6 - 1]
  if a5 != 0:
      r += l[a5 - 1]
  if a4 != 0:
      r += l[a4 - 1]
  if a3 != 0:
      r += l[a3 - 1]
  if a2 != 0:
      r += l[a2 - 1]
  if a1 != 0:
      r += l[a1 - 1]
  
  print(r)
  
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"}]