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
//package code;
import java.util.Scanner;
public class Code {

        
    public static void main(String[] args) {
        Scanner sc=new Scanner (System.in);
        int x=sc.nextInt();
        String r="123456789";
    for(int i=1;i<1.0/0;i++){
         if(x<=r.length()){
          System.out.println(r.charAt(x-1));
          break;
        }
        for(int j=0;j<=9;j++)
        r+=i+""+j;    
         } 
        
        
    }}
    