a-ii aaaa aaab aaai aaap aaar aaba aabb aabi aabp aabt aaib aaii aapa aapi aapt aara aari aarp aart aata aatt abaa abab abai abap abar abat abb- abba abbb abbi abbr abbt abia abib abir abit abpa abpi abpp abpr abra abri abta aiai aiba aiia aiib aiir aipa aipi aira airi airp airt aita aiti aitr aitt apai apap apar apat apba apbr api- apia apip apit appa appr appt apra apri aprt apta apti aptt arab arai arap arar arat arba arbi aria arib arii arip arit arpa arpi arr- arra arri arrr arrt arta arti artr at-t ataa atab atai atap atar atat atia atip atit atpr atra atri atrp atta atti attp attr ba-i baaa baar baat baba babb babi babr baia baib bair bait bapa bapi bapp bapt bar- bara barb bari barr bart bata bati batt bbbb bbpr biap biar biat biba bibb bibi bipa bipp bira birb biri birr birt bita bitt bpai bpti brab brai brat bria brit brrr btaa btbp btrt bttb iaaa iaai iaap iaat iaba iaia iapa iapp iapt iara iart iata iati ibar ibat ibia ibra ibri ibtb iiii iiit iipa iira iita iitr iitt ipat ipba ippa ippr ipri ipta irai irap irar irbp iri- iria irip irpa irra irri irta irti irtp itaa itai itap itar itat itia itpa itra itri itta paap paar paat paba pabt paia paib paip pair pait papa papb papi papp papr par- para pari parp parr part pata pati patr patt pbar pbpa piai piat pibb pibi piia piip pipa pipi pipp pira piri pirr pita piti pitr pitt ppap ppar ppib pppa pppp ppta pptt prai prar prat pri- pria prii prri prti prtp prtr ptab raab raat raba rabb rabi raia raii raip rair rait rapa rapi rapp rapt rara rarb rari rata rati ratp ratt rbbb rbbr riaa riab riai riat rib- riba riia ripa ripi ripp ripr ript riri rita riti ritt rpii rpta rrat rrrr rtai rtpa rttp taa- taar taat taba tabb tabi taia taip tair tait tapa tapi tapp tapr tapt tara tarb tari tarp tarr tart tata tatb tati tatr tatt tbar tbit tbrb tbta tbtp tiaa tiab tiar tiba tibi tiit tip- tipa tipi tipp tipt tira tirb tiri tirr tita titi titp titt tpap tpia tpir tppa tppp tppr tptp tptr traa trab trai trap trat tri- tria trib trip trit trpa trpp trra trtr ttab ttbb tttt