1
3
5 3 4
 6
5
5 3 4 4 5
3
1 1 1
5
4 4 3 4 4
5
5 5 4 3 2
3
1 1 2
5
5 4 3 5 5
 1
3
10 1 5

1
 1
-1
2
2
3
1
 1

#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    int x;
    cin >> x;
    int mx = 0;
    int j = -1;
    for (int i = 2; i <= n; i++) {
      int m;
      cin >> m;
      if (m > x) {
        mx = m;
        j = i;
      } else if (x > m) {
        mx = x;
        j = i;
      }
    }
    cout << j << endl;
  }
  return 0;
}
