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: leverage, solid, firm, amalgamated, concerted
Example Output: solid

Example Input: let go, praise, burn, fire, retire
Example Output: burn

Example Input: sugars, obese, big boned, fat, pasty
Example Output:
sugars