ppib ppic ppoa pppa pppo pppp pprc ppta pptt prai prao prar prat prbc prca prcc prcp pri- pria prii pro- proa prob proc proo prop prot prri prtc prti prtp prtr ptab ptca ptcc ptop pttc raab raat raba rabb rabi rabo rac- raca racc raci raco ract raia raic raii raip rair rait raob raoc raop rapa rapc rapi rapp rapt rara rarb rari raro rata rati rato ratp ratt rbbb rbbr rcac rcbc rcbo rccb rccc rcic rcpi rcpo rcpt rctc rcti riaa riab riai riat rib- riba ribo rica ricc rico rict riia riot ripa ripi ripp ripr ript riri rita riti rito ritt roab roap roar roat rob- roba robb robi robo robt roca rocc roco roia roio roir roit roob rooi roop roor root ropa ropo rora rorc rori roro rort rota rotc roti roto rotr rott rpca rpii rpob rpta rrat rrrr rtai rtca rtcc rtpa rttp taa- taar taat taba tabb tabc tabi tabo taca tacc taci taco tact taia taio taip tair tait taoa taor tapa tapi tapo tapp tapr tapt tara tarb tarc tari taro tarp tarr tart tata tatb tati tato tatr tatt tbar tbca tbcb tbcc tbit tbrb tbta tbtp tcap tcca tccc tcpa tcpo tctc tiaa tiab tiao tiar tiba tibi tica ticc tico tiit tiop tip- tipa tipc tipi tipo tipp tipt tira tirb tiri tiro tirr tita titc titi tito titp titt toab toat toba tobi tobo tobt toca toci toco toit tooa toor toot top- topa topi topo topp topt tora torc tori toro torp torr tort tota totc toti toto totr tott tpac tpap tpcp tpia tpir tppa tppp tppr tptp tptr traa trab trac trai trao trap trat trca trcc tri- tria trib tric trio trip trit troa troc troi troo trop trot trpa trpc trpp trra trtc trtr ttab ttbb ttcp ttop tttt