How clever you are! You've brought your invisibility cloak and the Marauder's Map to help you steal into Hogsmeade! Now, normally I don't condone sneaking about, but for you, I'll make an exception. Here's a riddle to help you crack the password:
Tear Me Off and
Scratch My Head
What Once was Red
Is Black Instead.
You'd better get going! You don't want Snape to catch you about these parts!