Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Ex Input:
merchandise, specialty, tools, content, angry

Ex Output:
angry


Ex Input:
current, timely, prompt, drink, do tests

Ex Output:
drink


Ex Input:
lollygag, cake, misuse, goodbye, fritter

Ex Output:

cake