https://www.acmicpc.net/problem/1105
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
public class Main {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer(br.readLine());
String str1 = st.nextToken();
String str2 = st.nextToken();
int count = 0;
if (str1.length() == str2.length()) {
for (int i=0; i<str1.length(); i++) {
if (str1.charAt(i) !=str2.charAt(i)) break;
if (str1.charAt(i) == '8') count++;
}
}
System.out.println(count);
}
}