import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		
		int a = in.nextInt();
		
		int h = a/100;
		int m = (int)(60*(a%100)/100.0);
		System.out.println((10+h)+":"+String.format("%02d", m));
	}
}