version 5 by Aaron Reed
By default, two commands are provided for the player to make use of Intelligent Hinting's functionality. "Suggest" (the suggesting action) will print to the screen the recommended next move; "Solve" (the solving action) will go a step further and actually perform the action for the player. The author is free to make only one or neither of these verbs available to the player by altering the Understand lines:
Understand the command "hint" as "suggest".
Understand the command "solve" as something new.
An author can toggle the suggest/solve functionality on or off temporarily with:
suspend suggestion hinting
reinstate suggestion hinting