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=[9, 189, 2889, 38889, 488889, 5888889, 68888889, 788888889, 8888888889, 98888888889, 1088888888889]
k=int(input())
if k<10:
    print(k)
else:    
    for n in range (0,12):
        if k>A[n+1]:
            continue
        else:
            a=10**(n+1)+(k-A[n]-1)//(n+2)
            b=(k-A[n]-1)%(n+2)
            print(str(a)[b])
            break