import aoclib


inp = aoclib.get_input(3, parser=aoclib.parse_lines_with_type_and_default(
    typ=lambda l: (l[: len(l)//2], l[len(l)//2:]), default=None))


def letter_value(x: str):
    if x.isupper():
        return ord(x) - 38
    else:
        return ord(x) - 96


def part1():
    total = 0
    for one, two in inp:
        both = set(one).intersection(set(two))
        for thing in both:
            total += letter_value(thing)

    return total


def part2():
    a = inp
    a = [x + y for x, y in a]

    total = 0

    for i in range(0, len(a), 3):
        common = set(a[i]).intersection(set(a[i+1])).intersection(set(a[i+2]))
        for thing in common:
            total += letter_value(thing)

    return total


aoclib.main(part1, part2)