n,m=input().split()

arr=list(map(int, input().split()))

a1=list(map(int, input().split()))

a=set(a1)

b1=list(map(int, input().split()))

b=set(b1)

happiness=0

for i in range(int(n)):

if arr[i] in a:
    happiness=happiness+1

for i in range(int(n)):

if arr[i] in b:
    happiness=happiness-1

print(happiness)