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

num = int(input())
for i in range(num):
    t = input()
    l = list(input().split(' '))
    s = set(l)
    res = 'NO'
    temp = ''
    for c in input().split(' '):
        if c in s:
            res = 'YES'
            temp = c
            break
    if res != 'NO':
        print(res)
        print('1 ' + temp)
    else:
        print(res)
