import java.util.*;
class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        String s=sc.nextLine();
        if(!(s.length<=1&&s.length<=10000)){
            System.out.print("Invalid input");
            return;
        }
        int x=sc.nextInt();
        int y=sc.nextInt();
        if(x<s.length())System.out.println((int)s.charAt(x));
        else System.out.println("Invalid input");
        if(y<s.length())System.out.println((int)s.charAt(y));
        else System.out.println("Invalid input");
    }
}