Syntax: OPEN   <object|direction>
Syntax: CLOSE  <object|direction>
Syntax: LOCK   <object|direction>
Syntax: UNLOCK <object|direction>
Syntax: PICK   <object|direction>

OPEN and CLOSE OPEN and CLOSE an object or a door.

LOCK and UNLOCK LOCK and UNLOCK a closed object or door.  You must have
the requisite key to LOCK or UNLOCK.

PICK can OPEN a LOCK without having the key.  In ORDER to PICK successfully,
you must PRACTICE the appropriate skill.