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: outdoor sport activity 
Words: fish, hiking, row, shark, canoe

Ex Output:
shark


Ex Input:
Category: secretary duty 
Words: errands, schedule appointments, image, make coffee, file

Ex Output:
image


Ex Input:
Category: aesthetic characteristic 
Words: pretty, beautiful, calm, fine, detailed

Ex Output:

calm