import java.util.Scanner;
public class Main
{
    public static void main(String[] args){
       Scanner sc = new Scanner(System.in);     
       int n = sc.nextInt();
       for(int i=1000;i<=n;i++) {
            int a =i/1000;
            int b =i/100%10;
            int c =i/10%10;
            int d =i%10;
            int x =1000*c+100*d+10*a+b;
            if(x==i && i%2==1) {
            	System.out.println(i);
            }
         } 
            
   }
}
/**************************************************************
	Problem: 1737
	User: admin
	Language: Java
	Result: Accepted
	Time:804 ms
	Memory:39936 kb
****************************************************************/