public class Display {

  private int value = 0;
  private int limit = 0;
  
  public Display(int limit) {
    this.limit = limit;
  }

  public void increase() {//指针跳一次，进位
    value++;
    if( value == limit ) {
      value = 0;
    }
  }
  
  public int getValue() {
    return value;
  }

}

public class Clock {
  private Display hour;
  private Display minute;
  private Display second;
  
  public Clock(int hour, int minute, int second) {
    this.hour = new Display(hour);
    this.minute = new Display(minute);
    this.second = new Display(second);
  }
  
  public void tick() {//秒针跳一下
    second.increase();
    if( second.getValue() == 0 ) {
      minute.increase();
      if( minute.getValue() == 0 ) {
        hour.increase();
      }
    }
  }
  
  public String toString() {
    return String.format("%02d:%02d:%02d\n", hour.getValue(), minute.getValue(),second.getValue());
  }
  
  public void start() {//分针跳一下
    while(true) {
      minute.increase();
      if( minute.getValue() == 0 ) {
        hour.increase();
      }
      System.out.printf("%02d:%02d\n", hour.getValue(), minute.getValue());
    } 
  }

  public static void main(String[] args) {
    java.util.Scanner in = new java.util.Scanner(System.in);
    Clock clock = new Clock(in.nextInt(), in.nextInt(), in.nextInt());
    while(true)
    {
      clock.tick();
      System.out.println(clock);
    }
  }
}