import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

public class Solution {

static String solve(int year){

// Complete this function

String leap = "12.09.";

String nleap = "13.09.";

String result;

if(year>1918){

if((year%400)==0||((year%4==0)&&(year%100)!=0)){

result = new String(leap);

result = result.concat(Integer.toString(year));

return result;

}

else {

result = new String(nleap);

result = result.concat(Integer.toString(year));

return result;

}

}

else if(year<1918){

if(year%4==0){

result = new String(leap);

result = result.concat(Integer.toString(year));

return result;

}

else {

result = new String(nleap);

result = result.concat(Integer.toString(year));

return result;

}

}

else if(year==1918){

result = new String("26.09.");

result = result.concat(Integer.toString(year));

return result;

}

else {

return "0";

}

}

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

int year = in.nextInt();

String result = solve(year);

System.out.println(result);

}

}