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
n = int(input())-1
c = 0
for i in range(11):
	c += 9*(i+1)* 10**i
	if c > n:
		n -= (c - 9*(i+1)* 10**i)
		v = n // (i+1)
		print(str(10**i + v)[n%(i+1)])
		break
