3664. Two-Letter Card Game

You are given a deck of cards represented by a string array cards, and each card displays two lowercase letters. You are also given a letter x. You play a game with the following rules: - Start with 0 points. - On each turn, you must find two compatible cards from the deck that both contain the letter x in any position. - Remove the pair of cards and earn 1 point. - The game ends when you can