A reversible prime（可逆的素数） in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal （十进制的）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（基数） D.
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.
Output Specification:
For each test case, print in one line Yes if N is a reversible prime with radix D, or No if not.
73 10
23 2
23 10
-2
Sample Output:
Yes
Yes
No
