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())
if (n<=9):
    print(n)
else:
    i=0
    while (n-9*10**(i)*(i+1)>0)&(i<=11):
        n=n-9*10**(i)*(i+1)
        i=i+1
    
    r=n%(i+1)
    p=n//(i+1)
    d=10**(i)+p-1
    if(r!=0):
        d=d+1
    ch=str(d)    
    print(ch[r-1])

    
