Given an integer array \(A\) of size \(N\) and a target value \(x\), output the index of \(x\) in the array. If \(x\) does not exist, output -1.

Constraints

\(1 \le N \le 10 ^ 6\)

\(-10 ^ 4 \le A_{i}, x \le 10 ^ 4\)

Input Specification

The first line of input consists of two integers \(N\) and \(x\), representing the size of the array and the target value respectively.

The next \(N\) lines will each consist of a single integer \(A_{i}\), representing the value of index \(i\) in the array.

Output Specification

Output the index of \(x\) in the array. If \(x\) is not in the array, output -1.

Sample Input

5 2
1
6
0
-2
2

Sample Output

4

Explanation for Sample Output

The number 2 is found at index 4 in the array \([1,6,0,-2,2]\). Note that the array is zero-indexed.