Returning to the Beautiful Gloomy Outback (BGO) after a strenuous trip to the city, you hear a faint howl in the distance. Instantly you realize it is your friend Fenrir inviting you to a howling contest.
In order to make an impressive howl that wins the contest, you know that your howl must fulfill the following criteria in order to be valid:
It must consist of a combination of the letters A, H, O and W. Each letter must occur at least once.
The howl can not contain two consecutive W’s, or two consecutive H’s.
The howl can not contain an H followed immediately by a W or an A.
There can never be an A after the first occurrence of an O.
Can you produce a longer howl than Fenrir and win the contest?
The first and only line of input contains a single word, the howl of Fenrir. Since Fenrir is a proper wolf, his howls are always valid. Writing down Fenrir’s howl will require at most $1$ MB of computer memory.
A valid howl which will win the howling contest.
|Sample Input 1||Sample Output 1|