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: guitar part 
Words: neck, strap lock, fret, angry, notes

SOLUTION: angry

PROBLEM: Category: shady activities 
Words: replace, unwarranted, pie, fudge, unlicensed

SOLUTION: pie

PROBLEM: Category: baby animals 
Words: cub, identity, buck, fawn, kid

SOLUTION:
identity