import java.util.Scanner;

public class No651 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int min = a*60 / 100;
		int hour = min / 60 + 10;
		min = min % 60;
		System.out.printf(hour + ":%02d\n",min);
	}
}