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

n1=int(input())
for x in range(n1):
    n2=input().split(" ")
    size1=int(n2[0])
    size2=int(n2[1])
    n3=input().split(" ")
    n4=input().split(" ")
    c= n3 and n4
    if(len(c)>=1):
        print("YES")
        print(1,c[0],sep=" ")
        print(" ")
    else:
        print("NO")
