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: consumer product 
Words: content, books, thing, program, jealous
jealous

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

Category: temperature 
Words: cool, scorching, chill, icy, confident

confident