Four Arrays

You have been given an integer $K$ and four arrays $A$, $B$, $C$, and $D$ with sizes $S_A$, $S_B$, $S_C$ and $S_D$ respectively. Follow the given steps: - Pick four indices $x$, $y$, $z$, and $w$ from arrays $A$, $B$, $C$, and $D$ respectively. Note that $(1 \le x \le S_A)$, $(1 \le y \le S_B)$, $(1 \le z \le S_C)$ and $(1 \le w \le S_D)$. - There are in total $S_A\times S_B\times S_C\times S_D