import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String[] sArray = sc.next().split("");
		double k = sc.nextDouble();
		for(int i = 0;i < sArray.length;i++) {
			double number = Double.parseDouble(sArray[i]);
			double count = Math.pow(number,5.0 * Math.pow(10, 15) );
			k -= count;
			if(k <= 0) {
				System.out.println((int)number);
				return;
			}
		}
	}
}
/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