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#include <fstream>
#include <set>
using namespace std;
ifstream fin("dtcsu.in");
ofstream fout("dtcsu.out");
int Q, lg, sol;
long long N;
set<long long> H;
int main()
{
long long x;
for (int i = 1; i <= 276997; ++i)
{
fin >> x;
if (x & 1)
H.insert(x);
}
fin >> Q;
while (Q--)
{
fin >> N;
if (N & -N)
N /= (N & -N);
if (H.find(N) != H.end())
++sol;
}
fout << sol << '\n';
fin.close();
fout.close();
return 0;
}