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#include <fstream>
using namespace std;
ifstream fin("dtcsu.in");
ofstream fout("dtcsu.out");
//unordered_set<int> Set;
bool v[666014];
int mod=666013;
int n,i,sol;
long long int x;
int main()
{
for(i=1;i<=276997;++i)
{
fin>>x;
//Set.insert(x%mod);
v[x%mod]=true;
}
fin>>n;
for(i=1;i<=n;++i)
{
fin>>x;
//if(Set.find(x%mod)!=Set.end()) sol++;
if(v[x%mod]==true)
sol++;
}
fout<<sol;
return 0;
}