fuel = 0
with open('input') as f:
    for mass in f:
        fuel += int(mass) // 3 - 2
print(fuel)

7e355d9a6e5cb6586db95f6f21ee352e783bc681
<mask token>

<mask token>
with open('input') as f:
    for mass in f:
        fuel += int(mass) // 3 - 2
print(fuel)

fuel = 0
with open('input') as f:
    for mass in f:
        fuel += int(mass) // 3 - 2
print(fuel)
