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

#!/usr/bin/env python
# coding: utf-8

# In[5]:


b=int(input())
for i in range(b):
    c=[]
    m=input().split()
    user_input = input().split()
    user_input2 = input().split()
    #strip is used to remove the white space. Not mandatory
    a = [int(x.strip()) for x in user_input]
    b=[int(x.strip()) for x in user_input2]
    for i in range(len(a)):
        if a[i] in b:
            c.append(a[i])
            print('YES')
            print(len(c),c[0])
            break
    if c==[]:
        print('NO')


# In[ ]:




