func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int q, l1, r1, l2, r2;     cin >> q;     while (q--) {       cin >> l1 >> r1 >> l2 >> r2;       if (l1 == l2 && r1 == r2)         cout << l1 <<     << r1 << endl;       else if (l1 == l2 && r1 != r2)         cout << r1 <<     << r2 << endl;       else if (l1 != l2 && r1 == r2)         cout << l1 <<     << l2 << endl;       else if (l1 != l2 && r1 != r2)         cout << l1 <<     << l2 << endl;     }   }   