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
a= int(input())
i=1
amount=a
while amount>i*((10**i)-(10**(i-1))):
    amount =amount - i*((10**i)-(10**(i-1)))
    i=i+1  
x= amount//i
y=amount%i
# print(amount)
# print(i)
# print(x)
# print(y)
if y==0: 
    if i==1:
        print(x%10)
    else:
        print((10**(i-1) + x -1)%10)
else:
    if i==1:
        print(x%10)
    else:
        print(((10**(i-1) + x)//(10**(i-y)))%10)