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;
}

}