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: ashamed, down, emotional upsets, disgusted, ground
Example Output: ground

Example Input: egret, crane, goose, dump truck, duck
Example Output: dump truck

Example Input: tangle, mild, flaxen, make the grade, fair
Example Output:
flaxen