func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t, n, p;     cin >> t;     for (; t > 0; t--) {       cin >> n >> p;       int br = 0;       for (int r = 1; r <= n; r++) {         for (int i = 1; i <= n; i++) {           cout << i <<     << (i + r - 1) % n + 1 << endl;           br++;           if (br == 2 * n + p) goto st;         }       }     st:;     }     return 0;   }   