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 sys

k = int(input())
d = [0]
for i in range(1, 12):
    d.append((10 ** i - 10 ** (i - 1)) * i + d[i - 1])
# print(d)
for i in range(1, len(d)):
    if k <= d[i]:
        f = d[i - 1]
        f1 = 10 ** (i - 1)
        # print(i, f)
        # print(str(((k - f - 1) // i) + f1))
        print(str(((k - f - 1) // i) + f1)[(k - f - 1) % i])
        sys.exit()
