age = input("Enter your age: ")
 
prices = ['free', 10, 15]

while True:
  if age == 'quit':
    break

  age = int(age)

  if age < 3:
    print(f'Your movie ticket is {prices[0]}.')
  elif age < 12:
    print(f'Your movie ticket costs ${prices[1]}.')
  else:
    print(f'Your movie ticket costs ${prices[2]}.')