PROTOLOGIST

go is it li lo oi op or os pi si so ti to

gip git goo gor gos got its lip lis lit log loo lop lot oil oot ops opt ors ort pig pis pit poi pol poo pot pro psi pst rig rip rot sip sir sit sol sop sot sri til tip tis tit tog too top tor tot

gilt gips girl giro girt gist gits glop goop goos gorp grip grit grot lips lisp list lits logo logs loop loos loot lops lost loti lots oils olio oops oots opts orts otto pigs piso pits plot pois polo pols pool poor poos port post pots prig prog pros rigs riot rips roil root roti rotl roto rots silo silt slip slit slog slop slot soil soli solo soot sori sort spit spot stir stop stot tils tilt tips tirl tiro tits togs toil toit tool toot topi topo tops tori toro tors tort tost tots trig trio trip trog trop trot