Alkohol Gedächtnisspiel

It's a memory game around alcohol.
Players must match the pairs with same picture. Who has the most pairs at the end of the game is the winner.
And here is the special additional rule:
Each card has two half-tasks, each with a letter as a symbol. If now 2 cards with the same symbol (not the same picture) are turned over, the half-tasks on the two cards complement each other and the whole task has to be completed.

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