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())

if(k>0 and k<10):
    print(k)
elif(k>=10 and k<190):
    result = 10+int((k-10)/2)
    if(k-10)%2 == 0:
        print(int(result/10))
    else:
        print(result%10)
elif (k>=190 and k<2890):
    result = 100+int((k-190)/3)
    if(k-190)%3 == 0:
        print(int(result/100))
    elif(k-190)%3 == 1:
        print(int((result%100)/10))
    else:
        print(result%10)
else:
    result = 1000+int((k-2890)/4)
    if(k-2890)%4 == 0:
        print(int(result/1000))
    elif(k-2890)%4 == 1:
        print(int((result%1000)/100))
    elif(k-2890)%4 == 2:
        print(int((result%100)/10))
    else:
        print(result%10)