rex rex rex rex rex rex rex rex rex rex
extras extras extras extras extras extras
extort extort extort extort extort extort
flexers flexers flexers flexers flexers flexers
exert exert exert exert exert exert exert exert
axles axles axles axles axles axles axles axles
extenders extenders extenders extenders extenders
extols extols extols extols extols extols
excellent excellent excellent excellent excellent
You should key this last set at least three times:
rex extras extort flexers exert axles extenders extols excellent