Lengthy error message for unknown command

[Zemdalk]

• Explanation

When I input an unknown command, the output is too lengthy.

You can consider using a new command like help to show list of commands, like

Sorry Duke could not understand your input :> please follow the instructions
Please enter 'help' for the list of commands.

• Screenshot

[nus-pe-script]

Your response not required for this bug as the team has accepted the bug as it is.