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.

Example Input: fat, ugly, sugar, salt, protein
Example Output: ugly

Example Input: blow, squander, apple, fritter, divide
Example Output: apple

Example Input: grub, frank, wienerwurst, weenie, courage
Example Output:
courage