import java.io.*;

public class Test_Tng{

        public static void main(String args[]){

                InputStream is = System.in;

               InputStreamReader isr = new InputStreamReader(is);

               BufferedReader br = new BufferedReader(isr);

               try{

                       String n = br.readLine();

                       long l = Long.valueOf(n).longValue();

                       long k=l, p=0;

                      

                       while(k!=0){

                              p=p*10 + k%10;

                              k=k/10;

                       } 

                       if(l==p) System.out.print(l + " la so thuan nghich ");

                       else System.out.print(l + "khong la so thuan nghich");           

               }

               catch(IOException ie){

                       System.out.println("Error: " +ie);

               }            

        }

}