class MahjongTile:
    SUITS = ['条', '筒', '万']

    def __init__(self, suit, value):
        if suit not in self.SUITS or not (1 <= value <= 9):
            raise ValueError("Invalid tile")
        self.suit = suit
        self.value = value
        self.index = ({"条": 0, "筒": 1, "万": 2}[suit]) * 9 + (value - 1)

    def __repr__(self):
        return f"{self.value}{self.suit}"

    def __eq__(self, other):
        return self.suit == other.suit and self.value == other.value

    def __hash__(self):
        return hash((self.suit, self.value))