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: bird 
Words: digger, heron, crane, mallet, sandpiper

Output: digger


Input: Consider Input: Category: animal 
Words: flutter, swim, ant, fly, bats

Output: flutter


Input: Consider Input: Category: shady activities 
Words: fudge, unlicensed, fix, lie, cream


Output: cream