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: type of sandwich 
Words: open-faced, team, roll, doorstep, club

SOLUTION: team

PROBLEM: Category: date status 
Words: belated, blue, early, detestings, current

SOLUTION: blue

PROBLEM: Category: direction 
Words: downward, ashamed, descending, down, backward

SOLUTION:
ashamed