#include <fstream>
#include <unordered_set>
#define Nrlinii 276997

using namespace std;

unordered_set < long long > H;

int main()
{
    int Q,i;
    long long sol=0,x;
    ifstream fin("dtcsu.in");
    for(i=1;i<=Nrlinii;++i)
    {
        fin>>x;
        if(x&1LL)
            H.insert(x);
    }
    fin>>Q;
    while(Q--)
    {
        fin>>x;
        if(x && H.find(x/(x&(-x)))!=H.end())
            ++sol;
    }
    ofstream fout("dtcsu.out");
    fout<<sol<<"\n";
    fout.close();
    return 0;
}