n, m = map(int, input().split(" "))
lst = list(map(int,input().split(' ')))
A = set(map(int,(input().split(' '))))
B = set(map(int,(input().split(' '))))

happiness = 0
for l in lst:
    if l in A:
        happiness +=1
    elif l in B:
        happiness -=1
print(happiness)