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.

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

Output: ice


Input: Consider Input: Category: animal 
Words: fish, iguana, canyoning, hamster, horse

Output: canyoning


Input: Consider Input: Category: aesthetic characteristic 
Words: light, texture, fair, pale, sunny


Output: sunny