American Mahjong isn't free-form — you win by matching one row on a published card exactly.
Most tile games let you build a hand however you like. American Mahjong doesn't. There's an annual card, and you have to complete one printed line — exactly.
📖Example: if a card line shows FFFF plus number groups, first count the groups and tile identities. A kong is four identical tiles, not the same number across mixed suits.