Let's write all the positive integer numbers one after another from 1 without any delimiters (i.e. as a single string). It will be the infinite sequence starting with 123456789101112131415161718192021222324252627282930313233343536...

Your task is to print the k-th digit of this sequence.

Input

The first and only line contains integer k (1 ≤ k ≤ 10000) — the position to process (1-based index).

Output

Print the k-th digit of the resulting infinite sequence.

Examples

Input


7


Output


7


Input


21


Output


5
                 //  B E A U T I F U L   L I F E   \\
import java.lang.Math ;
import java.util.Scanner ;
import java.lang.String ;

public class Main {

    private static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args){

        int k = scanner.nextInt();

        String res = "" ;

        for(int i = 1 ; i < 10001 ; i++){
            res += Integer.toString(i);
        }
        System.out.println(res.charAt(k-1));

    }

}
