#include<stdio.h>
#include<algorithm>

using namespace std;

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

const int len = 57000;
long long A[len+5];
int ch,in,sol;
const int n = 276997;
char buff[23];

int main () {
	
	int l = 1,r = len;
	for ( ; l <= n ; ){
		
		FILE*f=fopen("dtcsu.in","r");
		
		in = 0;
		
		long long x = 0;
		for ( int i = 1 ; i <= n ; ++i ){
			
			fgets(buff,20,f);
			if ( i >= l && i <= r ){
				
				x = 0;
				ch = 0;
				while ( buff[ch] >= '0' && buff[ch] <= '9' ){
					x = x*10 + buff[ch]-'0';
					++ch;
				}
				
				A[++in] = x;
			}
		}
		
		int q = 0;
		fgets(buff,20,f); ch = 0;
		while ( buff[ch] >= '0' && buff[ch] <= '9' ){
			q = q*10 + buff[ch]-'0';
			++ch;
		}
		
		sort(A+1,A+in+1);
		
		int left,middle,right;
		for ( int i = 1 ; i <= q ; ++i ){
			fgets(buff,20,f);
						
			long long x = 0;
			ch = 0;
			while ( buff[ch] >= '0' && buff[ch] <= '9' ){
				x = x*10 + buff[ch]-'0';
				++ch;
			}
			
			if ( x < A[1] || x > A[in] )	continue ;
			
			left = 1,right = in;
			while ( left <= right ){
				middle = (left+right)>>1;
				
				if ( A[middle] == x ){
					++sol; break ;
				}
				if ( A[middle] < x ){
					left = middle+1;
				}
				else{
					right = middle-1;
				}
			}
		}
		
		l += len,r += len;
		fclose(f);
	}
	
	fprintf(g,"%d\n",sol);
	
	fclose(g);
	
	return 0;
}