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:
trustworthy, decent, fair, tone, ok

Ex Output:
tone


Ex Input:
fritter, whittle, divide, misuse, dumpling

Ex Output:
dumpling


Ex Input:
concrete pourer, flamingo, egret, crane, duck

Ex Output:

concrete pourer