#include <iostream>
#include <stdio.h>
#include <unordered_set>
#include <string>
#include <vector>
using namespace std;
#define MAX_N 100
char s[MAX_N];
unordered_set <int> v;

int main(){
    FILE *fin,*fout;
    fin=fopen("dtcsu.in","r");
    fout=fopen("dtcsu.out","w");

    for(int i=0;i<276997;i++){
      fgets(s, MAX_N, fin);
      int a=0,f=0;
      while(s[f]!='\n'){
        a=a*10+s[f]-'0';
        f++;
      }
      v.insert(a);
    }

    int n=0,m;
    fscanf(fin,"%d",&m);
    fgetc(fin);
    for(int i=0;i<m;i++){
      fgets(s, MAX_N, fin);
      int a=0,f=0;
      while(s[f]!='\n'){
        a=a*10+s[f]-'0';
        f++;
      }
      if(v.find(a)!=v.end()){
        n++;
      }
    }

    fprintf(fout,"%d\n",n);

    fclose(fout);
    return 0;
}