CF Div2A

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n,m;
        int s1[n+5];
        int s2[m+5];
        int a=0;
        cin>>n>>m;
        for(int i=0;i<n;i++)
        {
            cin>>s1[i];
        }
        for(int j=0;j<m;j++)
        {
            cin>>s2[j];
        }
        for(int i=0;i<n;i++)
        {
            for(int j=0;j<m;j++)
            {
                if(s2[j]==s1[i])
                {

                    a=s1[i];
                    break;

                }





            }






        }
        if(a!=0)
        {
            cout<<"YES"<<endl;
            cout<<"1"<<" "<<a<<endl;
        }
        else
        {
            cout<<"NO"<<endl;
        }


    }
    return 0;
}