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.*;
import java.io.*;

public class Main {   
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        StringBuilder sb = new StringBuilder();
        for(int i = 1; i <= n; i++) {
            sb.append(i);
            if(sb.length() - 1 >= n) {
                break;
            }
        }
        String s = sb.toString();
        System.out.print(s.charAt(n - 1));
    }
}