#include<cstdio>
#include<vector>
#include<ctype.h>

using namespace std;

const int dim = 10073;
const int BUF_SIZE = 4096;

vector<long long> h[dim + 2];
char buf[BUF_SIZE];
long long ans, n = 276997LL;
int pos = 0;

inline char getChar(FILE *f) {
    if (pos == BUF_SIZE) {
        fread(buf, 1, BUF_SIZE, f);
        pos = 0;
    }
    return buf[pos++];
}

inline long long read(FILE *f) {
    long long result = 0LL;
    char c;
    do {
        c = getChar(f);
    } while (!isdigit(c));

    do {
        result = 10 * result + c - '0';
        c = getChar(f);
    } while (isdigit(c));

    return result;
}

int find(long long val) {

    int i, key = val % dim;

    for(i=0; i<(int)h[key].size(); ++i)
        if(h[key][i] == val)
            return 1;

    return 0;
}

int main() {

    FILE *f = fopen("dtcsu.in", "r");
    FILE *g = fopen("dtcsu.out", "w");

    long long val;

    while(n--) {
        val = read(f);
        if(val % 2)
            h[val % dim].push_back(val);
    }

    n = read(f);
    while(n--) {
        val = read(f);
        val /= (val & -val);
        ans += find(val);
    }

    fprintf(g,"%lld",ans);

    fclose(f);
    fclose(g);

    return 0;
}