text: import sys
  
  
  def encrypt(strng, key):
      encrypted = ''
      for x in strng:
          indx = (ord(x) + key) % 256
          if indx > 126:
              indx = indx - 95
          encrypted = encrypted + chr(indx)
      return encrypted
  
  
  def decrypt(strng, key):
      decrypted = ''
      for x in strng:
          indx = (ord(x) - key) % 256
          if indx < 32:
              indx = indx + 95
          decrypted = decrypted + chr(indx)
      return decrypted
  
  
  def brute_force(strng):
      key = 1
      decrypted = ''
      while key <= 94:
          for x in strng:
              indx = (ord(x) - key) % 256
              if indx < 32:
                  indx = indx + 95
              decrypted = decrypted + chr(indx)
          print("Key: {}\t| Message: {}".format(key, decrypted))
          decrypted = ''
          key += 1
      return None
  
  
  def main():
      print('-' * 10 + "\n**Menu**\n" + '-' * 10)
      print("1.Encrpyt")
      print("2.Decrypt")
      print("3.BruteForce")
      print("4.Quit")
      while True:
          choice = input("What would you like to do?: ")
          if choice not in ['1', '2', '3', '4']:
              print("Invalid choice")
          elif choice == '1':
              strng = input("Please enter the string to be ecrypted: ")
              while True:
                  key = int(input("Please enter off-set between 1-94: "))
                  if key in range(1, 95):
                      print(encrypt(strng, key))
                      main()
          elif choice == '2':
              strng = input("Please enter the string to be decrypted: ")
              while True:
                  key = int(input("Please enter off-set between 1-94: "))
                  if key > 0 and key <= 94:
                      print(decrypt(strng, key))
                      main()
          elif choice == '3':
              strng = input("Please enter the string to be decrypted: ")
              brute_force(strng)
              main()
          elif choice == '4':
              print("Goodbye.")
              sys.exit()
  
  
  main()
  