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: employment activity 
Words: replace, ice, fire, ban, hire

SOLUTION: ice

PROBLEM: Category: emotional display 
Words: buck, identity, culture, fawn, pester

SOLUTION: buck

PROBLEM: Category: bird 
Words: mallet, crane, sandpiper, davit, goose

SOLUTION:
davit