This took me a while, too, but it was fun when I figured it out. Some hints (rot13):
Hint 1: Gur neebj va gur fgnegvat ebbz ortvaf gur frdhrapr, ohg lbh arrq gb fgneg va gur cvt ebbz.
Hint 2: Gur neebjf cbvag gb nabgure neebj, juvpu cbvagf gb nabgure neebj, rgp.
Hint 3: Fgneg va gur cvt ebbz, gura zbir va gur frdhrapr gb gur arkg ebbzf ol sbyybjvat gur neebjf naq jurer gurl cbvag. Gurl'yy tybj gb fubj lbh'er qbvat vg evtug.
Hint 4: Gur frdhrapr vf qbja, yrsg, hc, yrsg, qbja, evtug, hc, yrsg, qbja, evtug, qbja.
Bonus Hint: V'q fgebatyl erpbzzraq pyrnevat bhg gur fgnpxrq erq/terra/oyhr oybpxf va gur iregvpny cvcr arne gur sbhe lryybj oevpxf fheebhaqvat va n qvnzbaq, vg znxrf gur frdhrapr rnfvre gb sbyybj.