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 = 1; i <= n; i++) {
            // 判断是否为回文数
            String s = String.valueOf(i);
            String result = "";
            for (int j = s.length() - 1; j >= 0; j--) {
                result += s.charAt(j);
            }
            if (result.equals(s)) {
                System.out.println(i);
            }
        }
    }
}