input: from typing import Tuple
  
  
  def replace_string(input_string: str, target_string: str, replacement_string: str) -> str:
      """Replace all occurrences of the target_string in input_string with the replacement_string.
      >>> replace_string("Hello World!", "World", "Python")
      'Hello Python!'
      >>> replace_string("Apples and Oranges", "Apples", "Fruits")
      'Fruits and Oranges'
      """
      return input_string.replace(target_string, replacement_string)
output:     return input_string.replace(target_string, replacement_string)