TASK DEFINITION: Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
PROBLEM: Category: police punishment 
Words: hearing, firstrate, alert, custody, fine

SOLUTION: alert

PROBLEM: Category: moral characteristic 
Words: light, unprejudiced, honorable, fair, unjust

SOLUTION: light

PROBLEM: Category: type of rigidity 
Words: hard, rough, firm, stiff, amalgamated

SOLUTION:
amalgamated