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.lang.*;
import java.io.*;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;

public class Main
{

    public static void main(String[] args) {
        int n=new Scanner(System.in).nextInt();

      String string=  IntStream.range(1,10001).mapToObj(String::valueOf).reduce("",(s,e)->s+e);
        System.out.println(string.charAt(n-1));

    }


}