//10.   Часовник - част 2
public class MyClass {
    public static void main(String args[]) {
       int maxMinuteAndSeconds = 59;
       int maxHour = 23;
       int currentHour = 0;
       while (currentHour <= maxHour) {
           for (int i = 0; i <= maxMinuteAndSeconds; i++) {
               for (int j = 0; j <= maxMinuteAndSeconds; j++) {
                    System.out.printf("%d : %d : %d\n",currentHour,i,j); //needed softuni solution
               /* System.out.printf("%02d : %02d : %02d\n",currentHour,i,j); //proper solution */
               }
           }
           currentHour++;
       }
    }
}