import java.util.Scanner;
import java.util.Arrays;
import java.util.Deque;
import java.util.ArrayDeque;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a=sc.nextInt();
        int b=a/100;
        int c=(int) ((a-b*100)*0.6);
        System.out.println(10+b+":"+c/10+""+c%10);
    }
}