import java.util.*;
import java.util.stream.Stream;
import java.time.*;
import java.time.format.*;

public class No651 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
        int h = 10 + (a / 100);
        int m = (a / 10) % 10 * 6 ;
        System.out.println(h + ":" + (m > 10 ? m : "0"+m));
	}
}