input: Write a python function to determine the type of user input and return it as a string.
  assert determine_input_type('hello') == "<class 'str'>"
  assert determine_input_type('123') == "<class 'str'>"
  assert determine_input_type('45.67') == "<class 'str'>"
output: def determine_input_type(user_input):
      return str(type(user_input))