import java.util.Arrays;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int number = in.nextInt();
        int result=0;
        int sum=0;

        for (int i = 2; i <10 ; i++) {
            result=number%i;
            if(result==0){
                System.out.println(i);
                sum=i*i;
                if(sum>=number){
                    break;
                }
            }


        }
    }
}