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

n = int(input())
start=1
end=9
nr=1
ran=9
l=1
while(1):
    if(n>ran):
        
        nr=ran
        start=start*10
        end = end*10+9
        l+=1
        ran = ran + (end-start+1)*l
    else:
        r = n-nr-1*(n>9)
        print(str(end//10+r//l+1)[r%l])
        break