Harry Answers play online

Harry pretends to be a virtual tarot that answers any question he is asked.
Our friends will be astonished when Harry answers to them what kind of clothes are they wearing, what they are holding in their hands or any personal question they want to ask.
This program surprises even the most skeptics and makes them find weird explanations.
Even the less superstitious persons will be frozen when Harry answers all of their questions.
Da secret!
So... how is it possible for this program to answer accurately to any question we make to it? Ok, lets see the trick...
The user (while writing the petition) enters the answer without our realizing it.
You can enter an answer by writing a dot (.) in the textbox "Petition". In its place a letter "H" will be shown.
Then you have to write the answer (and while you write the answer the petition will be shown).
What is the point in entering my own answers?
It makes sense if you show it to other people. They will see that Harry is answering to their questions.