Additional hints for level 5: (use ROT13 to decode)
- Va yriry 4, lbh nyernql xabj gung gurer pna or gjb-qvtvg ahzoref
- Lbh pna fvzcyl unir k=k
- zvahf fvtaf pna or hfrq nf artngvir fvtaf jura cynprq va sebag bs ahzoref
- gurer ner gjb cnvef bs rdhny ahzoref