3654.HQ

Time Limit: 1s Memory Limit: 256MB

The famous joke programming language HQ9+ has only 4 commands. In this problem we will explore its subset - a language called HQ...

Input Format(From the terminal/stdin)

The only line of the input is a string between 1 and 106 characters long.

Output Format(To the terminal/stdout)

Output "Yes" or "No".

Sample Input 1

Copy 
HHHH
    \n

Sample Output 1

Copy 
Yes
   \n

Sample Input 2

Copy 
HQHQH
     \n

Sample Output 2

Copy 
No
  \n

Sample Input 3

Copy 
HHQHHQH
       \n

Sample Output 3

Copy 
No
  \n

Sample Input 4

Copy 
HHQQHHQQHH
          \n

Sample Output 4

Copy 
Yes
   \n

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The rest of the problem statement was destroyed by a stray raccoon. We are terribly sorry for the inconvenience.

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