#include <bits/stdc++.h>
using namespace std;
 
int main() {
    int t, n;
    cin >> t;
    while (t--) {
        cin >> n;
        vector<int> a(n);
        for (int &x : a) cin >> x;
 
        int min1 = INT_MAX, min2 = INT_MAX;
        for (int x : a) {
            if (x < min1) {
                min2 = min1;
                min1 = x;
            } else if (x > min1 && x < min2) {
                min2 = x;
            }
        }
 
        if (min2 == INT_MAX) cout << "-1\n";
        else cout << min1 << " " << min2 << "\n";
    }
    return 0;
}
 

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