public Rules() {
        String[] pictures = {"2", "3", "4", "5", "6", "7", "8", "9", "10",
            "jack", "queen", "king", "ace"};
        String[] types = {"clubs", "spades", "hearts", "diamonds"};

        for (String picture : pictures) {
            validPictures.add(picture);
        }
        for (String picture : types) {
            validTypes.add(picture);
        }
    }