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

ints = [int(i) for i in input().split()]
A = set([int(i) for i in input().split()])
B = set([int(i) for i in input().split()])
    
happines = 0

for i in ints:
    if i in A:
        happines += 1
    elif i in B:
        happines -= 1

print(happines)