Not 100% sure if this is the intended solution, but what I did for him was: fnj gung gur svefg yrggre bs uvf ynfg anzr va gur znavsrfg jnf na harapelcgrq "X", naq jr xabj gung gur jevggra ybtf hfr gur vavgvnyf bs gur perjzrzore, fb bapr V xarj ur jnf Vfnnp V gevrq ragrevat "1009-YBT-VX"/"1010-YBT-VX" naq gubfr ybtf tvir lbh gur shyy ynfg anzr