lost

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define vi vector<int>
#define vll vector<long long int>

int main()
{
#ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif

    std::ios::sync_with_stdio(false);

    int t;
    cin >> t;
    while (t--)
    {
        ll n, k, pos = 0;
        cin >> n >> k;
        ll a[n];
        for (ll i = 0; i < n; i++)
            cin >> a[i];

        for (ll i = 0; i < n; i++)
        {
            if (a[i] == k)
            {
                pos = i + 1;
                break;
            }
        }
        if (pos == 0)
            cout << "not found" << endl;
        else
            cout << pos << endl;
    }
}