CF290E HQ
Description
The famous joke programming language HQ9+ has only 4 commands. In this problem we will explore its subset — a language called HQ...
Input Format
The only line of the input is a string between $ 1 $ and $ 10^{6} $ characters long.
Output Format
Output "Yes" or "No".
Explanation/Hint
The rest of the problem statement was destroyed by a stray raccoon. We are terribly sorry for the inconvenience.