#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
int n,i,j,p,q,m,x;
long long nr,k;
int w[276998];
char s[20];
int main()
{
    freopen("dtcsu.in","r",stdin);
    freopen("dtcsu.out","w",stdout);
    x=276997;
    for (i=1;i<=x;i++)
    {
        gets(s+1); nr=0; m=strlen(s+1);
        for (j=1;j<=m;j++) nr=nr*10+(s[j]-48);
        w[++n]=nr;
    }
    scanf("%lld",&q); m=0;
    for (i=1;i<=q;i++)
    {
        scanf("%d",&k);
        if (binary_search(w+1,w+n+1,k)==1) m++;
    }
    printf("%lld",m);
    return 0;
}