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

n=int(input())
for i in range(n):
  a=[]
  p=list(map(int,input().split()))
  q=list(map(int,input().split()))
  r=list(map(int,input().split()))
  for j in q:
    if j in r:
      a.append(j)
  a=sorted(a)
  if len(a)>0:
    print("YES")
    print('1',end=' ')
    print(a[0])
  else:
    print("NO")

