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#include <bits/stdc++.h>
#define P 10007
using namespace std;
ifstream fin("dtcsu.in");
ofstream fout("dtcsu.out");
vector<long long> h[P];
long long sol = 0;
void Add(long long x)
{
int r = x % P;
for (auto w : h[r])
if (w == x) return;
h[r].push_back(x);
}
bool Check(long long x)
{
int r = x % P;
for (auto w : h[r])
if (w == x) return 1;
return 0;
}
int main()
{
int i;
long long x,q;
for (i = 1; i <= 276997; i++)
{
fin >> x;
Add(x);
}
fin >> q;
while (q--)
{
fin >> x;
sol += Check(x);
}
fout << sol;
return 0;
}