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
s=0
t=0
c=0
k=int(input())
while(s<k):
    te=s
    temp=t
    t=t+(9*pow(10,c))
    s=s+(9*pow(10,c)*(c+1))
    c=c+1
a=(k-te)//c
re=(k-te)%c
if(re==0):
    a=a+temp
    a=str(a)
    print(a[-1])
else:
    a=a+temp+1
    a=str(a)
    print(a[re-1])
