input: Write a python function to decipher text encrypted with the Caesar cipher.
  assert decipher_caesar('Khoor Zruog', 3) == 'Hello World'
  assert decipher_caesar('Ebiil Tloia', 3) == 'Hello World'
  assert decipher_caesar('Lipps Asvph', 4) == 'Hello World'
output: def decipher_caesar(text, shift):
      result = []
      for char in text:
          if char.isalpha():
              shift_base = ord('A') if char.isupper() else ord('a')
              deciphered_char = chr((ord(char) - shift_base - shift) % 26 + shift_base)
              result.append(deciphered_char)
          else:
              result.append(char)
      return ''.join(result)