Elderly professor arrived, as usual, to work, went into the office and started to prepare for the lecture. But when he opened his briefcase to get his cherished tetradochku with notes, I found that it was gone. Immediately came up with the idea that he forgot to book the house. Hero wants you to go to his apartment, to find and bring back the note. You got the key and went to the professor's house. Search for a small notebook will have around the house, and that at least five rooms, and the time to spare. To control the time you have set the timer, it is left to the bottom right corner. Do not lose sight of him, if you see that the container is rapidly emptied, use the help in Professor's Notes.