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: fine, prime, firstrate, comfortable, ticket

SOLUTION: comfortable

PROBLEM: Category: guitar part 
Words: fret, worried, chord, notes, headstock

SOLUTION: worried

PROBLEM: Category: boxing terminology 
Words: dock, canvas, deck, blocking, caution

SOLUTION:
dock