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/* *

* Author: Pavith Bambaravanage

* URL: https://github.com/Pavith19

* */

/*JAVA-7*/

import java.util.Scanner;

class Solution{

public static void main(String[] argh){

Scanner scanner = new Scanner(System.in);

while (scanner.hasNext()){

String ipv4 = scanner.next();

System.out.println(ipv4.matches(new IPV4().string));

}

}

}

class IPV4{

String ipv4regex = "^(?: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]?)$";

public String string = ipv4regex;

}