print("a", ord("a"), "A", ord("A"))


def getitems(items: list[str]) -> int:
    # Source - https://stackoverflow.com/a
    # Posted by georg, modified by community. See post 'Timeline' for change history
    # Retrieved 2025-12-24, License - CC BY-SA 4.0

    seen = set()
    dupes = [x for x in items if x in seen or seen.add(x)]

    print(dupes)
    return sum(list(map(lambda x: ord(x), dupes)))


def tr(char: str) -> str:

    return char.upper() if char.islower() else char.lower()


def gitems(items: list[str]) -> int:
    # print(items, len(items))
    n = int(len(items) / 2)
    l, r = [(items[i : i + n]) for i in range(0, len(items), n)]
    # seen = set()
    # dupes = [x for x in items if x in seen or seen.add(x)]
    dupes = set(l) & set(r)
    rv = sum(
        list(map(lambda x: ord(tr(x)) - 64 if x.islower() else ord(tr(x)) - 70, dupes))
    )
    print(items, dupes, rv)
    return rv


with open("input", "+r") as file:
    t = 0
    for line in file.readlines():
        that = gitems(line.strip())

        t += that
        # print(line.strip(), that)

    print(t)