import java.io.; import java.util.; import java.util.regex.*;

public class Solution {

public static void main(String[] args) {
  Scanner keyboard = new Scanner(System.in);
  String input;
  while(keyboard.hasNext()){
    input = keyboard.next();
    System.out.println(validate(input));
  }
  keyboard.close();
}

public static boolean validate(String input){

    String arr [] = input.split("[\\.]");
    if(arr.length != 4)
        return false;

    Pattern p = Pattern.compile("[0-9]+");
    for(String s : arr){
      if(s.length() > 3){
        return false;
      }
      Matcher m = p.matcher(s);
        if((m.matches()) == false)
            return false;
      Integer value = Integer.parseInt(s);
      if(value < 0 || value > 255)
        return false;
    }
    return true;
}   

}

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 pattern = "^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\." + "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\." + "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\." + "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"; }

import java.io.; import java.util.;

class Solution {

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

private static boolean validateIP(String regex) {

    String[] regexArray = regex.split("\\.");
    if(regexArray.length != 4) {
        return false;
    }

    if(regexArray.length == 4) {
        String exp1 = regexArray[0];
        String exp2 = regexArray[1];
        String exp3 = regexArray[2];
        String exp4 = regexArray[3];

        if(exp1.length() > 3 || exp2.length() > 3 || exp3.length() > 3 || exp4. length() > 3) {
            return false;
        } 
        else if(Integer.parseInt(exp1) > 255 || Integer.parseInt(exp2) > 255 || Integer.parseInt(exp3) > 255 || Integer.parseInt(exp4) > 255) {
            return false;
        } 
        else {
            return true;
        }
    }
    return false;
}

}

String pattern="^(([01]?([0-9][0-9]?)|2[0-4][0-9]|25[0-5]?)\.){3}([01]?([0-9][0-9]?)|2[0-4][0-9]|25[0-5]?)$";