1
2 2
1 1
1 2
 1
1 3
3
1 2 3
 1
1 1
1000
1000
 1
2 2
2 2
2 2
 5
4 5
10 8 6 4
1 2 3 4 5
1 1
3
3
1 1
3
2
5 3
1000 2 2 2 3
3 1 5
5 5
1 2 3 4 5
1 2 3 4 5
 1
4 4
1 1 1 1
1 2 3 4
 1
2 3
1 1
1 2 3

YES
1 1
 YES
1 3
 YES
1 1000
 YES
1 2
 YES
1 4
YES
1 3
NO
YES
1 3
YES
1 1
 YES
1 1
 YES
1 1

n=int(input()) 
for i in range(n) :
     flag=0
     c=list(map(int,input(). strip(). split ())) 
     d=list(map(int,input().strip().split())) 
     e=list(map(int,input().strip().split()))
     for each in d:
          if each in e:
               print("YES") 
               print("1 "+str(each) ) 
               flag=1
               break
     if(flag==0) :
          print("NO") 

