[Link] https://www.acmicpc.net/problem/14425
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import java.util.*;
import java.io.*;
public class Main {
static BufferedReader br;
public static void main(String[] args) throws IOException {
br = new BufferedReader(new InputStreamReader(System.in));
StringBuilder sb = new StringBuilder();
int[] arr = getArr();
int n = arr[0], m = arr[1];
Trie trie = new Trie();
int cnt = 0;
for(int i = 0; i < n; i++) trie.add(br.readLine());
for(int i = 0; i < m; i++) if(trie.contains(br.readLine())) cnt++;
print(cnt);
}
static class Trie {
Trie[] arr = new Trie[26];
boolean end = false;
public void add(String s) {
Trie trie = this;
for(int i = 0; i < s.length(); i++) {
char ch = s.charAt(i);
if(trie.arr[ch - 'a'] == null) trie.arr[ch - 'a'] = new Trie();
trie = trie.arr[ch - 'a'];
}
trie.end = true;
}
public boolean contains(String s) {
Trie trie = this;
for(int i = 0; i < s.length(); i++) {
char ch = s.charAt(i);
if(trie.arr[ch - 'a'] == null) return false;
trie = trie.arr[ch - 'a'];
}
return trie.end;
}
}
static int toi(String s) { return Integer.parseInt(s); }
static String[] getLine() throws IOException { return br.readLine().split(" "); }
static int[] getArr() throws IOException { return Arrays.stream(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray(); }
static <T> void print(T s) { System.out.print(s); }
static <T> void println(T s) { System.out.println(s); }
}