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())
ans=[]
for _ in range(t):
    x=input().split()
    n=int(x[0])
    m=int(x[1])
    s=set()
    arr1=input().split()
    for i in range(n):
        s.add(int(arr1[i]))
    a=True    
        
    arr2=input().split()
    for i in range(m):
        if int(arr2[i]) in s:
            print("Yes")
            print("1 "+str(arr2[i]))
            a=False
            break
    if a:
        print("No")    

    



