import java.util.*;
import java.io.*;
public class price{
    public static void main (String [] args){
        Scanner in = new Scanner (System.in);
        double n = in.nextDouble();
        n = n*1.08;
        int num = (int)(n+0.5);
        if(num<206) System.out.println("Yay!");
        else if(num==206) System.out.println("so-so");
        else System.out.println(":(");
    }
}