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

for cases in range(int(input())):
    n,m= list(map(int, input().split()))
    lst1 = list(map(int, input().split()))
    lst2 = list(map(int, input().split()))
    count = 0
    for i in range(n-1, -1, -1):
        if lst1[i] in lst2:
            count = lst1[i]
            break
        elif i == n-1:
            print("NO")
            break
        else:
            continue
    print("YES")
    print("1", count)