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: concerned, bored, emotional, fret, output cord

Output: output cord


Input: Consider Input: color, medium, fair, warm, size

Output: warm


Input: Consider Input: doorstep, club, burger, submarine, group


Output: group