
import java.util.*;

import static java.lang.System.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        long K = sc.nextLong();

        double days = 5.0 * Math.pow(10, 15);  //兆:10^12, 1000兆: 10^15

        char ans = S.charAt(0);
        for(int i = 0; i < S.length(); i++){
            K -= Math.pow(Character.getNumericValue(S.charAt(i)), days);
            if(K <= 0){
                ans = S.charAt(i);
                break;
            }
        }

        out.println(ans);
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz