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.

Q: pastry, dunker, fritter, blow, cake

A: blow
****
Q: hardware, firewall, file, format, order office supplies

A: order office supplies
****
Q: club, hamburger, group, grilled cheese, dagwood

A:
group
****