func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a;     cin >> a;     while (a--) {       int b, c;       cin >> b >> c;       int arr1[b], arr2[c];       set<int> check;       for (int j = 0; j < b; j++) {         cin >> arr1[j];         check.insert(arr1[j]);       }       int x = -1;       for (int j = 0; j < c; j++) {         cin >> arr2[j];         if (check.count(arr2[j])) x = arr2[j];       }       if (x == -1)         cout <<  NO n ;       else {         cout <<  YES n ;         cout <<  1               <<     << x <<   n ;       }     }   }   