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
a = int(input())
c = [1] * 30
for i in range (1,20):
	c[i] = 9 * i * pow(10,i-1)
for i in range (1,15):
	if (a > c[i]):
		a -= c[i]
	else:
		d = int((a-1) / i + pow(10,i-1) - 1)
		e = (a-1) % i + 1
		f = str(d+1)
		print(f[e-1])
		exit()