You are provided with an "Event", "Intent" related to PersonX. Guess a reaction/reaction of PersonX about the given event and their intention.

Example Input: Event:PersonX sells well. Intent: 1) to be successful
Example Output: fulfilled

Example Input: Event:PersonX ends PersonX's trip. Intent: 1) to do something else
Example Output: free

Example Input: Event:PersonX prevents the ___ from slipping. Intent: 1) to prevent breakage
Example Output:
useful