def stud_eng(a,b):
    return len(a.symmetric_difference(b))  #a^b



if __name__ == '__main__':
    n = int(input())
    set1 = set(map(int,input().split()))
    b = int(input())
    set2 = set(map(int,input().split()))
    
    print(stud_eng(set1,set2))