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.

Category: secretary duty 
Words: organize, support, text, sort mail, file
text

Category: direction 
Words: up, descending, down, lower, melancholy
melancholy

Category: moral characteristic 
Words: sausage, frank, brash, stern, matter of fact

sausage