firewhisky:

While still alive they did divide
Their favourites from the throng,
Yet how to pick the worthy ones
When they were dead and gone?
‘Twas Gryffindor who found the way,
He whipped me off his head
The founders put some brains in me
So I could choose instead!
Now slip me snug about your ears,
I’ve never yet been wrong,
I’ll have a look inside your mind
And tell where you belong!