input: Write a python function to generate a random number between a given start and end.
  assert isinstance(generate_random_numbers(1, 10), int)
  assert 1 <= generate_random_numbers(1, 10) <= 10
  assert 20 <= generate_random_numbers(20, 30) <= 30
output: import random
  
  def generate_random_numbers(start, end):
      return random.randint(start, end)