"I want to be let in."
"I want to be let out."
"I want to be let in."
"I want to be let out."
....
(Now, if the silly girl would leave off bringing live venomous snakes into the house, we'd think about recommissioning the cat flap. As it is, she has to pass a visual inspection on re-entry; she is capable of miaowing loudly with a bird clenched in her jaws.)