private void add(char mana) {
        switch (valueOf(valueOf(mana))) {
            case B:
                manaBlack++;
                break;
            case G:
                manaGreen++;
                break;
            case R:
                manaRed++;
                break;
            case W:
                manaWhite++;
                break;
            case U:
                manaBlue++;
                break;
            default:
                break;
        }
    }