The session is the game for two participants:
SENDER, who sends the telepathy message, and CATCHER, who tries to get this message.
The SENDER opens a session, sends the password to the catcher, gets a set of 3 pictures,
concentrates on one of them, clicks on the according button, that sends the same set of pictures
to the catcher. After the CATCHER sends the reply, the SENDER gets a new set of pictures.
IF THE NUMBER OF PLAYERS IS GREATER THAN 100, YOU WILL BE
REDIRECTED TO THE FIRST PAGE. PLEASE ENTER LATER.
The CATCHER receives the password from the SENDER, receives the set of 3 picture
from the SENDER, tries to get the telepathy message from the SENDER, and clicks on the
according button. The program calculates the number of tries and the number of the correct guesses.