func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX = 505;   long long l1[MAX], l2[MAX], r1[MAX], r2[MAX], a1[MAX], a2[MAX];   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     int q;     cin >> q;     for (int i = 0; i < q; ++i) {       cin >> l1[i] >> r1[i] >> l2[i] >> r2[i];     }     for (int i = 0; i < q; ++i) {       a1[i] = l1[i], a2[i] = l2[i];       while (a1[i] == a2[i] && a2[i] <= r2[i]) {         a2[i]++;       }       cout << a1[i] <<     << a2[i] << endl;     }     return 0;   }   