prices = ['free', 10, 15]
while True:
age = input("Enter your age: ")
if age.lower() == '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]}.')
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