old_contents: import  sys     #For debug purposes
  import  random
  from collections import Counter
  
  FILEPATH    = "../CreatedFile.txt"
  FILENL      = 15 #createCylinder(->n)
  
  def     convertLetter(text):
      tmp_str = ""
  
      for letter in text:
          if letter.isalpha() and ord(letter) <= 123:
              tmp_str += letter
      return (tmp_str)
  
  def     mix():
      buf_str = ""
  
      for i in range(0, 26):
          buf_str += chr(random.randint(0, 25) + 65)
      return (buf_str)
  
  def     createCylinder(file, n):
      file_ = open(file, "w")
  
      for i in range(0, n):
          file_.write(mix() + "\n")
      file_.close()
  
  def     ft_getnewlinesnb(str_):
      count = 0
  
      for i in range(0, len(str_)):
          if (str_[i] == '\n'):
              count += 1
      return (count)
  
  def     loadCylinder(file):
      content = open(file, "r").read()
      lines_dict = {}
      i = 0
      buf = ""
  
      for i in range(0, ft_getnewlinesnb(content)):
          for j in range(0, 26):
              buf += content[(i * 27) + j]
          lines_dict[i + 1] = buf
          buf = ""
      #print(lines_dict)
      return (lines_dict)
  
  def     ft_is_anagram(str1, str2):
      if (len(str1) != len(str2)):
          return (False)
      return (Counter(str1) == Counter(str2))
  
  def     keyOK(key, n):
      tmp_str = ""
      while (n != 0):
          tmp_str += str(n)
          n -= 1
      return (ft_is_anagram(key, tmp_str))
  
  def     createKey(n):
      tmp_str = ""
      while (n != 0):
          tmp_str += str(n)
          n -= 1
      return (''.join(random.sample(tmp_str,len(tmp_str))))
  
  def     find(letter, alphabet):
      i = 0
  
      while (alphabet[i] != letter and i < len(alphabet)):
          i += 1
      return (i)
  
  def     shift(i):
      return ((-1), ((i + 6) % 25))[(i <= 25 and i >= 0)]
  
  print(shift(int(sys.argv[1])))
  
  
  
new_contents: import  sys     #For debug purposes
  import  random
  from collections import Counter
  
  FILEPATH    = "../CreatedFile.txt"
  FILENL      = 15 #createCylinder(->n)
  
  def     convertLetter(text):
      tmp_str = ""
  
      for letter in text:
          if letter.isalpha() and ord(letter) <= 123:
              tmp_str += letter
      return (tmp_str)
  
  def     mix():
      buf_str = ""
  
      for i in range(0, 26):
          buf_str += chr(random.randint(0, 25) + 65)
      return (buf_str)
  
  def     createCylinder(file, n):
      file_ = open(file, "w")
  
      for i in range(0, n):
          file_.write(mix() + "\n")
      file_.close()
  
  def     ft_getnewlinesnb(str_):
      count = 0
  
      for i in range(0, len(str_)):
          if (str_[i] == '\n'):
              count += 1
      return (count)
  
  def     loadCylinder(file):
      content = open(file, "r").read()
      lines_dict = {}
      i = 0
      buf = ""
  
      for i in range(0, ft_getnewlinesnb(content)):
          for j in range(0, 26):
              buf += content[(i * 27) + j]
          lines_dict[i + 1] = buf
          buf = ""
      #print(lines_dict)
      return (lines_dict)
  
  def     ft_is_anagram(str1, str2):
      if (len(str1) != len(str2)):
          return (False)
      return (Counter(str1) == Counter(str2))
  
  def     keyOK(key, n):
      tmp_str = ""
      while (n != 0):
          tmp_str += str(n)
          n -= 1
      return (ft_is_anagram(key, tmp_str))
  
  def     createKey(n):
      tmp_str = ""
      while (n != 0):
          tmp_str += str(n)
          n -= 1
      return (''.join(random.sample(tmp_str,len(tmp_str))))
  
  def     find(letter, alphabet):
      i = 0
  
      while (alphabet[i] != letter and i < len(alphabet)):
          i += 1
      return (i)
  
  def     shift(i):
      return ((-1), ((i + 6) % 26))[(i <= 25 and i >= 0)]
  
  def     cipherLetter(letter, alphabet):
      return (alphabet[shift(find(letter, alphabet))])
  
  print(cipherLetter(sys.argv[2], sys.argv[3]))
  
  
subject: add cipherLetter function