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

my_list = list(map(int, input().split(" ")))

set_a = set(map(int, input().split(" ")))

set_b = set(map(int, input().split(" ")))

happiness = 0

for i in my_list:

if i in set_a:

    happiness += 1

elif i in set_b:

    happiness -= 1

else:
    happiness

print(happiness)