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.

Ex Input:
Category: employment activity 
Words: fire, remove, praise, inferno, replace

Ex Output:
inferno


Ex Input:
Category: employment activity 
Words: promote, ice, retire, ban, fire

Ex Output:
ice


Ex Input:
Category: moral characteristic 
Words: well, dishonest, fair, decent, cool

Ex Output:

cool