#include <bits/stdc++.h>   using namespace std;   int t, n, m, a[1005], b[1005], ans;   bool c[1005], lol;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     cin >> t;     while (t--) {       lol = false;       fill(c, c + 1005, false);       cin >> n >> m;       for (int i = 0; i < n; ++i) {         cin >> a[i];         c[a[i]] = true;       }       for (int i = 0; i < m; ++i) {         cin >> b[i];         if (c[b[i]] == true) {           ans = b[i];           lol = true;         }       }       if (lol == true)         cout <<  YES n1   << ans <<   n ;       else         cout <<  NO n ;     }   }   