Vg'f xvaq bs purrfr. Lbh pna trg gur fnzr guvat jvgu "xvq nobir qbbe vf lbh" -> "xvq naq qbbe vf lbh" -> "xvq naq sbsb vf lbh" -> "xvq vf sbsb vf lbh". Lbh zvtug jnag gb pbafvqre erqbjaybnqvat gur tnzr ntnva fvapr V'ir svkrq n tbbq nzbhag bs purrfr va gur ynfg pbhcyr qnlf.