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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    static BufferedReader input = new BufferedReader(
        new InputStreamReader(System.in)
    );
    
    public static void main(String[] args) throws IOException {
        StringBuilder a = new StringBuilder();
        int current = 1;
        while (a.length() < 10000) {
            a.append(current);
            current++;
        }
        System.out.println(a.charAt(Short.parseShort(input.readLine()) - 1));
    }
}
