//#include <fstream>
#include<cstdio>
using namespace std;
//ifstream fin("dtcsu.in");
//ofstream fout("dtcsu.out");
FILE *fin=fopen("dtcsu.in","r");
FILE *fout=fopen("dtcsu.out","w");
//unordered_set<int> Set;
bool v[666014];
int mod=666013;
int n,i,sol;
long long x;

int main()
{
    for(i=1;i<=276997;++i)
    {
        fscanf(fin,"%lld",&x);
        //fin>>x;
        //Set.insert(x%mod);
        v[x%mod]=true;
    }
    fscanf(fin,"%d",&n);
//    fin>>n;
    for(i=1;i<=n;++i)
    {
        //fin>>x;
        fscanf(fin,"%lld",&x);
        //if(Set.find(x%mod)!=Set.end()) sol++;
        if(v[x%mod]==true)
            sol++;
    }

    fprintf(fout,"%d",sol);
   // fout<<sol;

    return 0;
}