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// https://www.hackerrank.com/challenges/java-regex/problem

import java.util.Scanner;

public class JavaRegex {

public static void main(String[] args){

Scanner scanner = new Scanner(System.in);

while(scanner.hasNext()){

String IP = scanner.next();

System.out.println(IP.matches(new MyRegex().pattern));

}

scanner.close();

}

class MyRegex {

final String pattern = "([0-1]?\\d{1,2}[.]|2([0-4]\\d|5[0-5])[.]){3}([0-1]?\\d{1,2}|2([0-4]\\d|5[0-5]))";

}