#include <iostream>
#include <set>
using namespace std;

int main() {
    int n;
    cin >> n;
    
    while (n--) {
        set<int> s;
        int wzpjsylai;
        bool found = false;
        
        while (cin >> wzpjsylai && wzpjsylai != -1) {
            if (!found && s.count(wzpjsylai)) {
                cout << wzpjsylai << '\n';
                found = true;
            }
            s.insert(wzpjsylai);
        }
        
        if (!found) {
            cout << "NONE\n";
        }
    }
    
    return 0;
}