#include <bits/stdc++.h>
#include <fstream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>

using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { ll B, T, F, P; };

unsigned MOD = 1000000007;
ll _MOD = 1000000007;
double EPS = 1e-10;
int UNKO = INT_MAX;

string s, t, r;

int main() { freopen("in.txt", "r", stdin);
    ll n;
    ll y, t;
    cin >> t;
    while(t--) {
        cin >> y >> n;
        cout << -1 << endl;
    }
    return 0;
}