The two wind-based yakuman: shousuushii ใๅฐๅๅใ and daisuushii ใๅคงๅๅใ. Both involve all four wind tiles. Shousuushii requires three groups winds, and a pair of the last wind, while daisuushii requires groups of all four. Both are worth yakuman, though daisuushii can be worth double yakuman if a ruleset allows it.