Each player/team keeps separate melds of the various ranks of cards. A player may never play to an opponent's meld. A legal meld consists of at least three cards of the same rank, and there is no limit on how large it can grow. Suits are irrelevant except that black threes are treated differently from red threes. Wild cards can be used as any rank except for threes. Threes may never be melded in ordinary play, although three or more black threes may be melded in the final turn of a player going out.