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

# import sys
# sys.stdin=open('input.in','r')
# sys.stdout=open('output.out','w')
n=int(input())
k=[]
for x in range(n):
	n,m=map(int,input().strip().split()[:2])
	l1=list(map(int,input().strip().split()[:n]))
	l2=list(map(int,input().strip().split()[:m]))
	for x in l1:
		if x in l2:
			k.append(x)
			break

	if k==[]:
		print('NO')
	else:
		print('YES')
		print(len(k),min(k))
	k=[]

