from collections import Counter 

def happy_counter(array, A, B):
    array_count=Counter(array) # Count how many times each integer is repeated in array
    
    repeated=0
    for integer in array_count.keys():
        # Only considering repeated terms, check if they are in A or B
        value=array_count[integer]-1 
        if value!=0:
            if integer in A:
                repeated+=value
            elif integer in B:
                repeated-=value
                
    # Non repeated terms are accounted for using the intersection method
    non_repeated=len(A.intersection(set(array)))-len(B.intersection(set(array)))
    return non_repeated+repeated

if __name__ == '__main__':
    n, m=list(map(int, input().split()))
    array= list(map(int, input().split())) 
    A=  set(map(int, input().split()))
    B=  set(map(int, input().split()))
    print(happy_counter(array, A, B))