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:
stern, frank, weenie, harsh, concise

Ex Output:
weenie


Ex Input:
deck, tko, rudder, level, corner

Ex Output:
rudder


Ex Input:
leverage, solid, firm, amalgamated, concerted

Ex Output:

solid