import java.util.Scanner;

class Main {
  public static void main(String[] args)
  {
    while (true)
    {
      Scanner in = new Scanner(System.in);
      int timeSec = in.nextInt();

      int sec =  timeSec % 60;
      int min =  (timeSec / 60) % 60;
      int hour = (timeSec / 3600) % 24;
      int day =  (timeSec / (3600*24)) % 60;
      System.out.printf("%02d:%02d:%02d:%02d \n", day, hour, min, sec);

    }
  }
}