import java.io.*;
public class Vaatleja4{
   public static void main(String[] arg) throws IOException{
      BufferedReader klaver=
        new BufferedReader(new InputStreamReader(System.in));
      Loendaja andmetalleti=new FailisLoendaja("autodearv.txt");
      while(!klaver.readLine().equals("x")){
         andmetalleti.lisa();
      }
      System.out.println(andmetalleti.kysi());
   }
}