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:
fair, pale, 70, clime, tangle

Ex Output:
pale


Ex Input:
fine, wispy, alright, mad, well

Ex Output:
wispy


Ex Input:
grasshopper, fly, walk, bus, eagle

Ex Output:

bus