#include<stdio.h>

int search(int A[],int n,int key){
  int i=0;
  A[n] = key;
  while(A[i] != key){
    i++;
  }
  return i! = n;
}

int main(){
  int i,n,A[10000+1],q,key,sum=0;

  scanf("%d",&n);

  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }

  scanf("%d",&q);
  for(i=0;i<q;i++){
    scanf("%d",&key);
    if(search(A,n,key)){
      sum++;
    }

    printf("%d\n",sum);

    return 0;
	  	 
}

