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[37]:


l = list(map(int,input().split()))


# In[38]:


a = list(map(int,input().split()))


# In[39]:


b = list(map(int,input().split()))


# In[40]:


flag = 0
for i in b:
    if i in a:
        print("YES")
        print("1"+" "+str(i))
        flag = 1
        break


# In[41]:


if flag == 0:
    print("NO")

