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문제

You are one of ICPC participants and in charge of developing a library for multiprecision numbers and radix conversion. You have just finished writing the code, so next you have to test if it works correctly. You decided to write a simple, well-known factorial function for this purpose:

$$M! = \prod_{i=1}^{M}{i} = M \times (M - 1) \times \cdots \times 2 \times 1, 0! = 1\text{.}$$

Your task is to write a program that shows the number of trailing zeros when you compute M! in base N, given N and M.

입력

The input contains multiple data sets. Each data set is described by one line in the format below:

N M

where N is a decimal number between 8 and 36 inclusive, and M is given in the string repre- sentation in base N. Exactly one white space character appears between them.

The string representation of M contains up to 12 characters in base N. In case N is greater than 10, capital letters A, B, C, ... may appear in the string representation, and they represent 10, 11, 12, ..., respectively.

The input is terminated by a line containing two zeros. You should not process this line.

출력

For each data set, output a line containing a decimal integer, which is equal to the number of trailing zeros in the string representation of M! in base N.

예제 입력 1

10 500
16 A
0 0

예제 출력 1

124
2