(spoilers, encoded with rot13.com)
light hint:
lbh unir gb chfu gur 7 synt hc hagvy vg ernpurf gur genpx orybj gur 5 synt.
strong hint:
ng fbzr cbvag lbh jvyy arrq gb chfu gur 8 synt hc.
step-by-step solution:
chfu gur 7 synt hc bagb gur gjb genpxf, gura chfu gur 8 synt hc. yrnir gur ebpx va sebag bs gur ghaary naq hfr gur 7 gb erragre gur ghaary naq ergevrir gur ebpx. bssfrg lbhefrys ol hfvat gur ybjre genpx, chfu gur 7 hc bapr naq erghea gb gur 8 lbh chfurq hc. gura bssfrg ntnva, chfu gur 7 hc ntnva naq cebprrq vagb jurer lbh chfurq vg. gung fubhyq or rabhtu gb rkvg evtug.
hope this helps!