a=int(input())
W=list(map(int,input().split()))
b=int(input())
B=list(map(int,input().split()))

W=[(w,0) for w in W]
B=[(b,1) for b in B]

A=W+B
A.sort()

ANS=1

for i in range(1,len(A)):
    if A[i][0]!=A[i-1][0] and A[i][1]!=A[i-1][1]:
        ANS+=1

print(ANS)