Snake

Input

Given the integers $n$, $m$, $x$, $y$ (1 \le x \le n \le 50, 1 \le y \le m \le 50). Here, $n$ is the number of matrix lines, $m$ is the number of matrix columns, and $x$ and $y$ are the numbers of the row and column of the element to print.

Output

Print the element at line $x$ and column $y$.

Examples