Given the task definition and input, reply with output. 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.

Category: bird 
Words: winch, egret, crane, digger, neck

digger
Given the task definition and input, reply with output. 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.

Category: bird 
Words: winch, egret, crane, digger, neck

user
digger
assistant
Given the task definition and input, reply with output. 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.

Category: bird 
Words: winch, egret, crane, digger, neck

digger