5. "24 Game" is a familiar math game to many people, the game process is as follows: arbitrarily draw 4 cards from 52 cards (excluding the joker), use the numbers on these 4 cards $(A=1, J=11, Q=12, K=13)$ to get 24 through addition, subtraction, multiplication, and division. The first person to find the algorithm wins. The game rules state that all 4 cards must be used, and each card can only be used once. For example, with $2,3,4, Q$, the algorithm $(2 \times Q) \times(4-3)$ can be used to get 24.
Wang Liang, in one game, drew $7,7,7,3$, and found that $7+7+7+3=24$. If a set of 4 cards that can be directly added to get 24 is called a "friendly card set",
then, the number of different "friendly card sets" containing the maximum number 7 is $\qquad$ sets.
$4$