0 is a locked openable door. It is south of Room 10. The description of door to room 10 is "An ordinary classroom door. [if the location is Room 10 and door to room 10 is closed]On the inside is taped yet another stamp collecting poster. It really did get old after a while.[otherwise]On the outside it says in large letters 'Welcome to Room 10.'[end if]".
Section 6 - The Bulletin Board