#include <iostream>

using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, a, b;
    cin >> n;
    while (cin >> oct >> a >> b)
        cout << hex << uppercase << a + b << endl;
}

#include 

using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, a, b;
    cin >> n;
    while (cin >> oct >> a >> b)
        cout << hex << uppercase << a + b << endl;
}

測資3會TLE