I must admit I'm not too fond of word puzzles like this as they are too much dependent on the player using the same vocabulary as the designer (guess what, English is not my native language). You should be able to solve the puzzle with the material given. This is why I like graphical or mathematical (gasp!) logic puzzles somewhat more.
I don't know if anyone here has read the "Destiny Quest" gamebook, but the author has included some really great logical puzzles there. They consist of some ancient dwarven stone tables on which some numbers are ordered to an unknown system. The player must deduce this system and fill in the missing spaces, which give the code number with which to progress. Fantastic.
Aside: How about a function where the character
, if he/she is that intelligent, might give some hints to the player before the monitor...?