题目描述

A reversible prime
 in any number system is a prime whose "reverse" in that
number system is also a prime. For example in the decimal system 73 is a
reversible prime because its reverse 37 is also a prime.



Now given any two positive integers N (< 105
) and D (1 < D <= 10), you are supposed to tell if N is a
reversible prime with radix D.

输入描述:

The input file consists of several test cases.  Each case occupies a line which contains two integers N and D.  The input is finished by a negative N.

输出描述:

For each test case, print in one line "Yes" if N is a reversible prime with radix D, or "No" if not.

输入例子:

73 10
23 2
23 10
-2

输出例子:

Yes
Yes
No