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

import java.util.Scanner;

/*
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/**
 *
 * @author Pollock
 */
public class DigitSequence {
    public static void main(String[] args) {
        Scanner sc = new Scanner (System.in);
        String s = "";
       
        for(int i=0;i<10001;i++){
        s=s+Integer.toString(i);
        }
        int i= sc.nextInt();
        System.out.println(s.charAt(i));
       
       
    }
}
