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.

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

Output: bus


Input: Consider Input: normal, commander, sargent, private, general

Output: normal


Input: Consider Input: bee, fly, walk, fish, run


Output: walk