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
def scand():
    return int(input())
def scana():
    return [int(x) for x in input().split()]

def count(t):
    ret=0
    for char in t:
        if char in ['a','e','i','o','u']:
            ret+=1
    return ret

t=''.join([str(t) for t in range(5000)])

n=scand()

print(t[n])
