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
k=int(input(""))
t=0
if k==0:
    print("Invalid input")
    exit()
while k>0:
    if k<=(9*10**t)*(t+1):
        m=k//(t+1)
        l=k
    k=k-(9*10**t)*(t+1)
    t+=1
p=l%t
if p==0:
    n=10**(t-1)+m-1
    o=n%10
else:
    n = 10**(t-1) + m
    o=((n//(10**(t-p)))%10)
print(o)





