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

t = list(map(int, input().split()))

for i in range(t[0]):
	l = list(map(int, input().split()))
	a = list(map(int, input().split()))
	b = list(map(int, input().split()))
	a.sort(reverse = True)
	b.sort(reverse = True)

	for i in a:
		for j in b:
			if i in b:
				print("YES")
				print(1, i)
				break
	print('NO')