input: Write a function to generate a random number between 0 and 9 that is divisible by 3. The function should keep generating random numbers until it finds one that meets the criteria and then return that number.
  assert generate_random_divisible_number() in [0, 3, 6, 9]
  assert type(generate_random_divisible_number()) is int
output: import random
  
  def generate_random_divisible_number():
      while True:
          num = random.randint(0, 9)
          if num % 3 == 0:
              return num