    import java.io.*;
     
    class Main {
        public static void main(String arts[]){
          int a;
	  int b;
          String buf;
          
              BufferedReader br
                  = new BufferedReader(new InputStreamReader(System.in));
              buf = br.readLine();
              a = Integer.parseInt(buf);
              b = Integer.parseInt(buf);
            if (a + b <= 16){
              System.out.println("Yay!");
                             }else{System.out.println(":(");
                                  }
						}
		}