#include<cstdio>
#include<unordered_set>
#define DIM 8192
using namespace std;
char buffer[DIM];
int position=0;
unordered_set<long long> Set;
void read(long long &number){
    number=0;
    while(buffer[position]<'0'||buffer[position]>'9'){
        position++;
        if(position==DIM){
            fread(buffer,1,DIM,stdin);
            position=0;
        }
    }
    while(buffer[position]>='0'&&buffer[position]<='9'){
        number=number*10+buffer[position]-'0';
        position++;
        if(position==DIM){
            fread(buffer,1,DIM,stdin);
            position=0;
        }
    }
}
int main(){
    freopen("dtcsu.in","r",stdin);
    freopen("dtcsu.out","w",stdout);
    int i,answer=0;
    long long x,q,n;
    for(i=1;i<=276997;i++){
        read(x);
        if((x&1))
            Set.insert(x);
    }
    read(q);
    for(i=1;i<=q;i++){
        read(n);
        if(n!=0)
            n/=n&(-n);
        if(n!=0&&Set.find(n)!=Set.end())
            answer++;
    }
    printf("%d",answer);
    return 0;
}