why don't i get the answer i want

[naughtyCat]

def answer(cards: list) -> (bool, int):
    res = None
    def isStraight(cards: list) -> bool:
        nonlocal res
        res = [cards[0]]
        count = 1
        cards.sort()
        for n, card in enumerate(cards):
            if count == 5: return count == 5
            elif n:
                if card-cards[n-1] == 1:
                    count += 1
                    res.append(card)
                else:
                    count = 1
                    res = [card]
        return count == 5
    
    if isStraight(cards):
        return (isStraight(cards), max(res))
    else:
        return (isStraight(cards), None)

def main() -> print:
    player = {'h': [5, 7]}
    table = {'H': [13], 'h': [10, 12, 11, 9]}
    valid = player
    key = table.keys()
    for k in key:
        if k in valid:
            valid[k] = valid[k]+table[k]
        else:
            valid[k] = table[k]
    value = valid.values()
    res = []
    for v in value:
        res = res+v
    if answer(res)[0]:
        print(*answer(res))

if __name__ == "__main__":
    main()
    

Output:
True 13