#include <iostream>

using namespace std;

int main() {

int t, seq[3];

cin >> t;

for (int j = 1; j <= t; j++){

for(int i = 0; i<= 3; i++){

cin >> seq[i];

}

if(seq[0] + seq[3] == seq[1] + seq[2]){

cout << seq[0] << seq[1] << seq[2] << seq[3] << seq[3] + seq[1] - seq[0] << endl;

}

else{

cout << seq[0] << seq[1] << seq[2] << seq[3] << seq[3] * seq[1] / seq[0] << endl;

}

}

return 0;

}