package m.shin;
import java.util.Scanner;
public class Con651 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int a = s.nextInt();
		s.close();

		int h = 10 , m = 0;
		m += (a % 100) * 60 / 100;
		h += (a / 100) + m / 60;
		h %= 24;
		m %= 60;

		String as = Integer.toString(h) , bs = Integer.toString(m);
		if(as.length() == 1){
			as = "0" + as;
		}
		if(bs.length() == 1){
			bs = "0" + bs;
		}
		System.out.println(as + ":" + bs);

	}

}