import java.util.regex.Matcher; import java.util.regex.Pattern; import java.util.Scanner;

class Solution{

public static void main(String[] args){
    Scanner in = new Scanner(System.in);
    while(in.hasNext()){
        String IP = in.next();
        System.out.println(IP.matches(new MyRegex().pattern));
    }

}

} class MyRegex{ String reg = "([0-9]|[0-9][0-9]|[0|1][0-9][0-9]|2[0-5][0-5]|2[0-4][0-9])"; String pattern = reg+"."+reg+"."+reg+"."+reg; }