import java.util.HashMap;
import java.util.Scanner;
import java.util.Set;


public class JudgingTroubles {
	
	Scanner in = new Scanner(System.in);  
	
	/*int number = in.nextInt();
	long big_number = in.nextLong();
	double decimal = in.nextDouble();
	String word = in.next();
	String line = in.nextLine();*/

	HashMap<String, Integer> buildMap(int start, int end, String[] listAll){		
		
		HashMap<String, Integer> newMap = new HashMap<String, Integer>();

		for (int i=start; i<end; i++){
			String word = listAll[i];
			if (newMap.containsKey(word)){
				newMap.put(word, newMap.get(word)+1);
			}
			else{
				newMap.put(word, 1);
			}
		}

		return newMap;
	}

	int consistentResults(){
		int results = in.nextInt();
		String[] listAll = new String[results*2];
		for(int i=0; i<results*2; i++) listAll[i] = in.next();
		
		HashMap<String, Integer> wordCount1 = buildMap(0,results, listAll);		
		HashMap<String, Integer> wordCount2 = buildMap(results,results*2, listAll);

		int count = 0;
		Set<String> allWords = wordCount1.keySet();
		for (String word: allWords){
			if (wordCount2.containsKey(word)){
				int value1 = wordCount1.get(word);
				int value2 = wordCount2.get(word);
				if (value1<value2){
					count += value1;
				}
				else{
					count += value2;
				}
			}
		}
		System.out.println(count);
		return count;
	}
	
	public static void main(String[] args){
		JudgingTroubles meg = new JudgingTroubles();
		meg.consistentResults();
	}
	

}