#include <bits/stdc++.h>
#define double long double 
using namespace std;
int n, m;

int ask (int t) {
    cout <<"? "<< t << endl;
    int x;
    cin >> x;
    return x;
}
void Print (int x) {
    cout << "! " << x << endl;
}

void solve () {
    for (int i = 1923; i < 2023; i ++) {
        if (ask (i) == 1) {
            // cout << "! " << i << endl;
            Print (i);
            return;
        }
    }
     // cout << "! " << 2023 << endl;

    Print (2023);
}
signed main () {
    int T = 1; 
    std::ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
    cin>>T;
    while (T --) solve ();
    return 0;
}