with open('input.text', 'r') as file: data: list[str] = file.readlines() total = 0 for line in data: sides = [int(s) for s in line.split('x')] sides.sort() l, w, h = sides ribbon = (l * 2 + w * 2) + (l*w*h) total += ribbon print(f'Total Ribbon: {total}')