func_code_string: #include <bits/stdc++.h>   #pragma GCC target( avx )   #pragma GCC optimize( O3 )   #pragma GCC optimize( unroll-loops )   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     long long int A, B, C, D, E, H, W, M, K, L, R, N, X, Y, Z, num = 0, sum = 0,                                                                flag = 0;     string S, T;     cin >> Z;     while (Z--) {       cin >> N >> M;       vector<long long int> P(N, 0);       vector<long long int> Q(M, 0);       for (long long int i = 0; i < N; i++) cin >> P[i];       for (long long int i = 0; i < M; i++) cin >> Q[i];       sort(P.begin(), P.end());       sort(Q.begin(), Q.end());       num = -1;       for (long long int i = 0; i < N; i++)         for (long long int j = 0; j < M; j++)           if (P[i] == Q[j]) num = P[i];       if (num == -1)         cout <<  NO  << endl;       else {         cout <<  YES  << endl;         cout << 1 <<     << num << endl;       }     }   }   