func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int n, m;     cin >> n >> m;     int a[n][m];     for (int i = 0; i < n; i++) {       for (int j = 0; j < m; j++) cin >> a[i][j];     }     int b[m][n];     bool flag = false;     int index = -1;     for (int i = 0; i < m; i++) {       for (int j = 0; j < n; j++) {         cin >> b[i][j];         if (b[i][j] == a[0][0] && !flag) {           flag = true;           index = i;         }       }     }     for (int i = 0; i < n; i++) {       int curr = b[index][i];       for (int j = 0; j < n; j++) {         if (a[j][0] == curr) {           for (int k = 0; k < m; k++) cout << a[j][k] <<    ;           cout << endl;         }       }     }   }   int main() {     long long int t = 1;     cin >> t;     while (t--) {       solve();     }   }   