#include <cstdio>
#include <bitset>
using namespace std;

template<const int Size, const int nrHash>
class BloomFilter{
    bitset<Size> B;

public:
    void update(unsigned long long x){
        int times = nrHash;
        while (times--){
            B[x % Size] = true;
            x <<= 1;
        }
    }

    bool query(unsigned long long x){
        int times = nrHash;
        while (times--){
            if (!B[x % Size])
                return false;
            x <<= 1;
        }
        return true;
    }
};

BloomFilter<6948437, 60> B;
const int buffSize = 1 << 17;
char buff[buffSize];

int main(){
    FILE* in = fopen("dtcsu.in", "r");
    FILE* out = fopen("dtcsu.out", "w");
    setvbuf(in, buff, _IOFBF, buffSize);

    int times = 276997;
    long long x;
    while (times--){
        fscanf(in, "%lld", &x);
        B.update(x);
    }

    int ans = 0;
    fscanf(in, "%d", times);
    while (times--){
        fscanf(in, "%lld", &x);
        ans += B.query(x);
    }

    fprintf(out, "%d\n", ans);

    return 0;
}