What an exciting day! You and and your friends were invited to meet your old teacher and mentor, Professor Herodotus, who for the past few years lived abroad. Professor Herodotus is staying at the Caesar Hotel, a new and luxurious hotel located in Caesarea and runs completely automatically. Thus, upon your arrival after a long and tedious drive, instead of a welcoming receptionist you were "greeted" by a silent envelope carrying your names. Inside the envelope was a short note: "My dears, Please accept my deepest apologists for my current absent. Something unexpected has come up. If you be so kind as to wait for my return you are more then welcome to do so in the comfort of my room where you will find tea and refreshments. Please see attached the electric key." Well-aware that Professor Herodotus never liked cell-phones you joke about it and good heartedly take one of the elevators to the fourth floor where his room is located. Upon reaching his room (401) you insert the electric key.
