input: Write a function to generate an even number between 10 and 200 that is divisible by 5.
  assert generate_even_number()>=10 and generate_even_number()<=200
  assert generate_even_number()%2==0
  assert generate_even_number()%5==0
output: import random
  
  def generate_even_number():
      while True:
          num = random.randint(10, 200)
          if num % 2 == 0 and num % 5 == 0:
              return num