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);
}
}
}