import java.io.*;
import java.util.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class Solution {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Pattern pattern = Pattern.compile("^\\d{1,2}[A-Za-z]{3,}\\.{0,3}$");
        Matcher matcher = pattern.matcher(scanner.nextLine());
        boolean found = matcher.find();
        System.out.println(found);
    }
}