One of:
 <E>nter
 <K>nown
 <R>ead
 <A>ide options (aides only)
 <G>oto: (type room name)
 <S>kip to: (type room name)
 <H>elp: (type name of help file)
 <Z>apped rooms list
 <T>erminate
 <+>, <-> skip to next, previous room
 <>>, <<> skip to next, previous floor