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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 ipPart = "([01]?\\d{1,2}|2[0-4]\\d|25[0-5])";

String pattern = "(" + ipPart + "\\.){3}" + ipPart;

}