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 = int(input())
for rounds in range(T):
    n = list(map(int, input().split()))
    a1 = list(map(int, input().split()))
    a2 = list(map(int, input().split()))
    cnt_arr = [0 for i in range(1001)]
    for i in range(n[0]):
        cnt_arr[a1[i]] +=1
    for i in range(n[1]):
        cnt_arr[a2[i]] +=1
    k = 9999
    idx = -1
    for i in range(1001):
        if cnt_arr[i]<=k and cnt_arr[i]>1:
            k = cnt_arr[i]
            idx = i
    if idx !=-1:
        print('YES')
        print(k-1, idx)
    else:
        print('NO')