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.*;

public class cf1177a {

    public static void main(String[] args) {
        
        Scanner in = new Scanner(System.in);
        StringBuilder a = new StringBuilder();
        int now = 1;
        while (a.length() < 10000) {
            
            a.append(now++);
            
        }
        
        int n = in.nextInt() - 1;
        
        System.out.println(a.charAt(n));
        
        
    }

}
