'''
There is an array of  integers. There are also  disjoint sets,  and , each containing  integers. You like all the integers in set  and dislike all the integers in set . Your initial happiness is . For each  integer in the array, if , you add  to your happiness. If , you add  to your happiness. Otherwise, your happiness does not change. Output your final happiness at the end.

Note: Since  and  are sets, they have no repeated elements. However, the array might contain duplicate elements.

Input Format

The first line contains integers  and  separated by a space.
The second line contains  integers, the elements of the array.
The third and fourth lines contain  integers,  and , respectively.

Output Format

Output a single integer, your total happiness.
Sample Input

3 2
1 5 3
3 1
5 7
Sample Output

1
'''

n,m=map(int,input().split())
arr=list(map(int,input().split()))
A=set(map(int,input().split()))
B=set(map(int,input().split()))
print(sum((i in A) - (i in B) for i in arr))