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#include <stdio.h>
#include <bitset>
#define lmax 276997
#define mod1 666013
#define mod2 712343
#define mod3 4756891
#define mod4 3564131
using namespace std;
typedef long long int ll;
int n,nr;
ll x;
bitset <5000010> uhash;
int hash1(ll x) { return (x+21)%mod1; }
int hash2(ll x) { return (x+23)%mod2; }
int hash3(ll x) { return (x+19)%mod3; }
int hash4(ll x) { return (x+17)%mod4; }
int main()
{
freopen("dtcsu.in","r",stdin);
freopen("dtcsu.out","w",stdout);
for (int i=1;i<=lmax;i++) {
scanf("%lld",&x);
uhash[hash1(x)]=1; uhash[hash2(x)]=1; uhash[hash3(x)]=1; uhash[hash4(x)]=1;
}
scanf("%d",&n);
for (int i=1;i<=n;i++) {
scanf("%lld",&x);
if (uhash[hash1(x)]==1 && uhash[hash2(x)]==1 && uhash[hash3(x)]==1 && uhash[hash4(x)]==1) nr++;
}
printf("%d",nr);
return 0;
}