#include<stdio.h>
#include<set>
#define MOD1 10007
#define MOD2 666013

using namespace std;

int div[]={2,3,5,7,11};
set<int> check[MOD1];
int r=0,q,n;

int main()
{
    freopen("dtcsu.in","r",stdin);
    freopen("dtcsu.out","w",stdout);

    for(int i=0;i<27699;++i){scanf("%d\n",&q);check[q%MOD1].insert(q%MOD2);}
    scanf("%d",&q);
    set<int>::iterator it;
    for(int i=0;i<q;++i)
    {
        scanf("%d",&n);
     //   for(int j=0;j<5;++j)
      //      while(n%div[j]==0)n/=div[j];
         it=check[n%MOD1].find(n%MOD2);
         if(it!=check[n%MOD1].end())r++;
    }
    printf("%d\n",r);
    return 0;
}