#include <bits/stdc++.h>
#define ll long long

using namespace std;

ifstream f("dtcsu.in");
ofstream g("dtcsu.out");

set <ll> S;
string s;

ll cnv(string s)
{
    stringstream ss;
    ss<<s;
    ll val;
    ss>>val;
    return val;
}

int main()
{
    for(int i=1;i<=276997;i++)
    {
        f>>s;
        S.insert(cnv(s));
    }
    int Q,nr=0;
    f>>Q;
    while(Q--)
    {
        f>>s;
        if(S.find(cnv(s))!=S.end())
            nr++;
    }
    g<<nr;

    return 0;
}