func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int q;     cin >> q;     while (q--) {       int a, b, c, d;       cin >> a >> b >> c >> d;       if (a != c)         cout << a <<     << c << endl;       else if (a != d)         cout << a <<     << d << endl;     }   }   