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 convert(list): 
      
    # Converting integer list to string list 
    s = [str(i) for i in list] 
      
    # Join list items using join() 
    res = int("".join(s)) 
      
    return(res) 

def split(word): 
    return [char for char in word] 

x = [i for i in range(2800)]
l = (convert(x))
p = str(l)
main = split(p)

k = int(input())
print(main[k-1])