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 i in range(t):
                    n,m=input().split()
                    ln=input().split()
                    lm=input().split()
                    for i in ln:
                              c=t=0
                              for j in lm:
                                        if(i==j):
                                                  c+=1
                                                  t=j
                    if(c==0):print("NO")
                    else:
                              print("YES")
                              print(c," ",t)
