Hackney carriages are a common sight in the city.

I participated in a hackday and developed a new feature for our app.

Hackdays are a great opportunity for collaboration and innovation.

He is the king of hackdom.

My friend's last name is Hackman.

The Hackbarths are a lovely family.

My friend's last name is Hackbarth.

The Hackenbergs are a famous family in town.

My friend's last name is Hackenberg.

My friend's last name is Hackel.