input: Write a function to generate an even number between 10 and 200 that is divisible by 5. If the given number is not divisible by 5, then it should increment and check the next number until it finds a valid number. If the given number is not even, then it should increment and check the next number until it finds a valid number. If no such number exists, return -1.
  assert generate_even_number() in [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200]
  assert generate_even_number() % 5 == 0
  assert generate_even_number() % 2 == 0
  assert generate_even_number() >= 10 and generate_even_number() <= 200
output: def generate_even_number():
      for num in range(10, 201, 2):
          if num % 5 == 0:
              return num
      return -1