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#include <bits/stdc++.h>
using namespace std;
ifstream fin("dtcsu.in");
ofstream fout("dtcsu.out");
const int NMAX = 276997;
unordered_set<int> v;
long long read() {
string s;
getline(fin, s);
long long x = 0;
for(string :: iterator it = s.begin(); it < s.end(); it++)
x = x * 10 + (*it - '0');
return 0;
}
int main()
{
int nr = 0;
for(int i = 0; i < NMAX; i++)
v.insert(read());
long long k = read();
while(k--) {
long long x = read();
if(v.find(x) != v.end()) nr++;
}
fout << nr;
fin.close();
fout.close();
return 0;
}