Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Input: Consider Input: Category: social gathering 
Words: group, clan, team, club, doorstep

Output: doorstep


Input: Consider Input: Category: computers 
Words: hardware, sort mail, download, program, file

Output: sort mail


Input: Consider Input: Category: window material 
Words: translucent fabric, spatula, handle, glass, panel


Output: spatula