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 whereis(k):
    n = 1
    while k > 0:
        k -= 9*10**(n-1)*n
        n+=1
    else:
        n-= 1
        return n

def kthdigit(k):
    a = whereis(k)
    sequence = ''
    sum = 0
    for b in range(1, a):
        sum += 9*10**(b-1)*b
    i = k-sum
    divider = (i-1)/a    
    remainder = (i-1)%a    
    number = divider + 10**(a-1)
    string = ''
    for huh in range (number, number+1):
        string += str(huh)
        
    return string[remainder]
we = input()
print kthdigit(we)

        

    
    