Level 18 (rot13): Gung'f n bar-jnl tngr ba gur evtug, fb lbh arrq gb frg hc rirelguvat hc gbc gur jnl lbh jnag vg orsber lbh tb gb gur obggbz. Oybpxf pna chfu bgure oybpxf vs gurer'f n fcnpr va orgjrra, ohg abg vs gurer'f ab fcnpr va orgjrra.
Level 19: Fnzr vqrn, ohg abj lbh qba'g unir n pbairavrag bireunat fb vg'f tbvat gb gnxr fbzr gevpxl znarhirevat gb cynpr gjb oybpxf arkg gb rnpu bgure va gur evtug fcbg.