JAVA SOLUTION import java.io.; import java.util.;

public class Solution {

public static void regex(String ip){
    String [] ipParts = ip.split("[.]");

    if (ipParts.length != 4) {
        System.out.println("false");
        return;
    }

    for (String string : ipParts) {
        if(string.length() > 3) {
          System.out.println("false");
          return;
        }       
        else if(string.length() <= 2 && !string.matches("^[0-9][0-9]{0,3}$")){
          System.out.println("false");
          return;
        }            

        else if((string.length() == 3 && string.charAt(1) == '5' ) && !string.matches("^[0-2][0-5][0-5]{0,3}$")){
            System.out.println("false");
            return;
        }

        else if(string.length() == 3 && !string.matches("^[0-2][0-5][0-9]{0,3}$")){

            System.out.println("false");
            return;
        }
    }
    System.out.println("true");

}

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */

    Scanner sc = new Scanner(System.in);
    while (sc.hasNext()) {
        String ip = sc.nextLine();
        regex(ip);
    }        
}

}