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())
terms = 1
n = 9
total = 0
# 9, 90, 900, 9000 etc...
while N > terms*n:
	N = N - terms*n
	total = total + n
	terms=terms+1
	n = n*10
print(str(total+(N+terms-1)//terms)[(N-1)%terms])