package Practice;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.util.StringTokenizer;

public class B14426 { //Á¢µÎ»ç ã±â

static int count;

public static void main(String[] args) throws Exception {

// TODO Auto-generated method stub

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

StringTokenizer st = new StringTokenizer(br.readLine());

int N = Integer.parseInt(st.nextToken());

int M = Integer.parseInt(st.nextToken());

Trie trie = new Trie();

for(int i = 0; i < N; i++) trie.insert(br.readLine());

for(int i = 0; i < M; i++) trie.contain(br.readLine());

System.out.println(count);

}

static class Trie {

TrieNode Node = new TrieNode();

void insert(String str) {

TrieNode node = this.Node;

for(int i = 0; i < str.length(); i++) {

int alpha = str.charAt(i) - 'a';

if(node.childNode[alpha] == null) node.childNode[alpha] = new TrieNode();

node = node.childNode[alpha];

}

}

void contain(String str) {

TrieNode node = this.Node;

for(int i = 0; i < str.length(); i++) {

int alpha = str.charAt(i) - 'a';

if(node.childNode[alpha] == null) return;

node = node.childNode[alpha];

}

count++;

}

}

static class TrieNode {

TrieNode[] childNode = new TrieNode[26];

}

}