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: N = int(input())
  
  
  def Base_10_to_n(X, n):
      X_dumy = X
      out = ""
      while X_dumy > 0:
          out = str(X_dumy % n) + "," + out
          X_dumy = int(X_dumy / n)
      return out
  
  
  ans = Base_10_to_n(N, 26)
  l = list(ans.split(","))
  for i in range(len(l) - 1):
      if int(l[i]) == 1:
          print("a", end="")
      if int(l[i]) == 2:
          print("b", end="")
      if int(l[i]) == 3:
          print("c", end="")
      if int(l[i]) == 4:
          print("d", end="")
      if int(l[i]) == 5:
          print("e", end="")
      if int(l[i]) == 6:
          print("f", end="")
      if int(l[i]) == 7:
          print("g", end="")
      if int(l[i]) == 8:
          print("h", end="")
      if int(l[i]) == 9:
          print("i", end="")
      if int(l[i]) == 10:
          print("j", end="")
      if int(l[i]) == 11:
          print("k", end="")
      if int(l[i]) == 12:
          print("l", end="")
      if int(l[i]) == 13:
          print("m", end="")
      if int(l[i]) == 14:
          print("n", end="")
      if int(l[i]) == 15:
          print("o", end="")
      if int(l[i]) == 16:
          print("p", end="")
      if int(l[i]) == 17:
          print("q", end="")
      if int(l[i]) == 18:
          print("r", end="")
      if int(l[i]) == 19:
          print("s", end="")
      if int(l[i]) == 20:
          print("t", end="")
      if int(l[i]) == 21:
          print("u", end="")
      if int(l[i]) == 22:
          print("v", end="")
      if int(l[i]) == 23:
          print("w", end="")
      if int(l[i]) == 24:
          print("x", end="")
      if int(l[i]) == 25:
          print("y", end="")
      if int(l[i]) == 0:
          print("z", end="")
  
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"}]