```
#include <bits/stdc++.h>
using namespace std;

int main() {
    int n,a,mm,maxnn = -1000,maxnnnn = - 1000;
    double b,maxn = -1000;
    cin >> n;
    for(int i = 0; i < n; i++){
    	cin >> mm;
    	for(int i = 0; i < mm; i++){
    		cin >> a;
    		maxnn = max(maxnn,a);
    		if(maxnnnn % 10 < a % 10) maxnnnn = a;
		}
		cout << maxnnnn << endl << maxnn << endl;
		maxnn = -1000;
		maxnnnn = -1000;
		for(int i = 0; i < mm; i++){
    		cin >> b;
    		maxn = max(maxn,b);
		}
		cout << maxn << endl;
		maxn = -1000;
	}
    return 0;
}