TASK DEFINITION: Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
PROBLEM: concerned, fret, notes, frustrated, worried

SOLUTION: notes

PROBLEM: ice, let go, fire, sack, replace

SOLUTION: ice

PROBLEM: resistant, sustainability, united, firm, ceo

SOLUTION:
resistant