pnin pnpp pnra pntr ppac ppan ppap ppar ppcc ppci ppib ppic pppa pppn pppp pprc ppta pptn pptt prai pran prar prat prbc prca prcc prcp pri- pria prii prin prna prnp prri prtc prti prtp prtr ptab ptca ptcc pttc raab raan raat raba rabb rabi rac- raca racc raci ract raia raic raii rain raip rair rait rana ranc rani rann rant rapa rapc rapi rapp rapt rara rarb rari rata rati ratp ratt rbbb rbbr rcac rcbc rccb rccc rcic rcnr rcpi rcpt rctc rcti riaa riab riai rian riat rib- riba rica ricc rict riia riin rina rinn ripa ripi ripp ripr ript riri rita riti ritt rnai rnbr rncp rnin rnnt rntp rpca rpii rppn rpta rptn rrat rrna rrrr rtai rtan rtca rtcc rtpa rttp taa- taan taar taat taba tabb tabc tabi taca tacc taci tact taia tain taip tair tait tana tani tann tant tapa tapi tapp tapr tapt tara tarb tarc tari tarn tarp tarr tart tata tatb tati tatr tatt tbar tbca tbcb tbcc tbit tbrb tbta tbtp tcap tcca tccc tcnn tcpa tctc tiaa tiab tian tiar tiba tibi tica ticc tiit tina tinc tini tinn tint tip- tipa tipc tipi tipp tipt tira tirb tiri tirr tita titc titi titp titt tnbc tnca tncc tpac tpap tpcp tpia tpir tppa tppp tppr tptp tptr traa trab trac trai tran trap trat trca trcc tri- tria trib tric trin trip trit trna trpa trpc trpn trpp trra trtc trtr ttab ttbb ttcn ttcp tttt