input: Write a python function to generate random numbers within a specified range.
  assert 1 <= generate_random_numbers(1, 10) <= 10
  assert 20 <= generate_random_numbers(20, 30) <= 30
  assert -10 <= generate_random_numbers(-10, 10) <= 10
output: import random
  
  def generate_random_numbers(start, end):
      return random.randint(start, end)