None. They can't climb the ladder.
A: Er two. Or maybe one. No --- on second thoughts make that two. Is that okay with you
Well it depends on what you mean by change.
It's no bad luck to walk under a truck.
Two. One to hold the ladder and one to screw your mother - I mean light bulb!
Don't be silly, Black Lives Matters protesters can't change anything.
Two. The light bulb you remove and the light bulb you replace it with.
Because they need a fandom that won't make them feel like trash.
Nah brah, tadah brah!
The elevator men are on strike!
That's impossible, because they can't climb the ladder.