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: animal 
Words: jog, jump, fish, fly, bats

Ex Output:
jog


Ex Input:
Category: mode of transportation 
Words: swim, bike, soar, fly, jump

Ex Output:
jump


Ex Input:
Category: secretary duty 
Words: type, file, correspondence, order office supplies, software

Ex Output:

software