A blonde, a redhead, and a brunette just robed a bank.
The alarm is sounding and they hear police sirens just around the corner drawing closer.
So they see three big empty bags and jump inside them to hide.
The police run around the corner and stop at the bags-clearly curious.
They kick the brunettes bag and she says:
"Bark, bark!"
So the police say, "Oh it's just a dog." And they walk past it.
They kick the redheads bag and she says:
"Meow, meow!"
So the police say, "Oh it's just a cat." And they walk past it.
They kick the blondes bag and she says:
"Potatoes."