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
k = int(input())
ch = 0
i = 0
r = 1
while k > r - 1:
    r += 9 * (i + 1) * 10 ** i
    i += 1
r -= 9 * i * 10 ** (i - 1)
#print(r, i)
print(str((k - r) // i + 10 ** (i - 1))[(k - r) % i]  )
