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
ll= lambda : list(map(int,input().split()))
testcases=1
# testcases=int(input())
for testcase in range(testcases):
	[k]=ll()
	s=""
	for i in range(1,5000):
		s+=str(i)
	print(s[k-1])