from string import ascii_lowercase


def parse(filename: str) -> list[tuple[str, str]]:
    with open(filename) as f:
        return list(map(lambda x: (x[0 : int((len(x) - 1) / 2)], x[int((len(x) - 1) / 2) : -1]), f.readlines()))


def convert(char: str) -> int:
    return ord(char) - 96 if char in ascii_lowercase else ord(char) - 38


def solve(bagpacks: list[tuple[str, str]]) -> int:
    return sum(map(convert, [(filter(lambda x: x in bagpack[1], bagpack[0])).__next__() for bagpack in bagpacks]))


def main():
    print(solve(parse("input")))


if __name__ == "__main__":
    main()