no-idea.py

n, m = map(int, input().split())

array = list(map(int, input().split()))
A = set(map(int, input().split()))
B = set(map(int, input().split()))

happiness = 0
for element in array:
    if element in A:
        happiness += 1
    elif element in B:
        happiness -= 1

print(happiness)