import java.util.*;

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

        int h = a / 100;

        double temp = (double)(a % 100) / 100.0;
        int m = (int)(temp * 60.0);

        if(m < 10) System.out.println(h + 10 + ":0" + m);
        else System.out.println(h + 10 + ":" + m);
    }
}