input: Write a python function to generate a random 3x4 matrix with values between 1 and 10.
  assert len(generate_random_matrix()) == 3
  assert all(len(row) == 4 for row in generate_random_matrix())
  assert all(1 <= elem <= 10 for row in generate_random_matrix() for elem in row)
output: import random
  
  def generate_random_matrix():
      return [[random.randint(1, 10) for _ in range(4)] for _ in range(3)]