Ah, yes, lots of folks have had trouble there.
Hint 0: There's no need for guesswork, this one's a logic puzzle.
Hint 1: Remember the <rot13> pngrtbel bs chmmyr 12. </rot13>
Hint 2: Make sure you understand the <rot13> uvagf ng gur obggbz pbearef </rot13>.
Hint 3: <rot 13> Gurer ner 2 "jbeqf" yrsg... </rot13>
Big Hint: <rot12> ...ngf ftqk mdq ftq emyq. </rot12>