import java.util.Scanner;

public class no207 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();

        for (; b>=a; a++) {
            if (String.valueOf(a).contains("3") || a % 3 == 0) {
                System.out.println(a);
            }
        }
    }
}