a-ii a-iv aaaa aaab aaai aaap aaar aaav aaba aabb aabi aabp aabt aaib aaii aapa aapi aapt aara aari aarp aart aata aatt aava abaa abab abai abap abar abat abb- abba abbb abbi abbr abbt abia abib abir abit abpa abpi abpp abpr abra abri abta abva abvp aiai aiba aiia aiib aiir aipa aipi aira airi airp airt aita aiti aitr aitt aiva apai apap apar apat apba apbr api- apia apip apit appa appr appt apra apri aprt apta apti aptt aptv arab arai arap arar arat arba arbi aria arib arii arip arit arpa arpi arr- arra arri arrr arrt arta arti artr artv arva arvi at-t ataa atab atai atap atar atat atia atip atit atpr atra atri atrp atta atti attp attr atvi avab avar avat avia avip avit aviv avra avri avva 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 bava bavi bbbb bbpr biap biar biat biba bibb bibi bipa bipp bira birb biri birr birt bita bitt bivi bpai bpti brab brai brat brav bria brit brrr brvi btaa btbp btrt bttb btvi iaaa iaai iaap iaat iaba iaia iapa iapp iapt iara iart iata iati iava ibar ibat ibia ibra ibri ibtb iiii iiit iipa iira iita iitr iitt ipat ipba ippa ippr ipri ipta iptv irai irap irar irbp iri- iria irip irpa irra irri irta irti irtp itaa itai itap itar itat itia itpa itra itri itta ivai ivar ivbv paap paar paat paba pabt paia paib paip pair pait papa papb papi papp papr par- para pari parp parr part parv pata pati patr patt pava pbar pbpa piai piat pibb pibi piia piip pipa pipi pipp pira piri pirr pita piti pitr pitt piva ppap ppar ppbv ppib pppa pppp ppta pptt pptv prai prar prat pri- pria prii priv prri prti prtp prtr ptab pvpa raab raat raba rabb rabi raia raii raip rair rait rapa rapi rapp rapt rara rarb rari rata rati ratp ratt rava ravi rbbb rbbr riaa riab riai riat rib- riba riia ripa ripi ripp ripr ript riri rita riti ritt riva rivp rpii rpta rrat rrrr rtai rtpa rttp rtva rtvi 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 tatv tava tavi tbar tbit tbrb tbta tbtp tbvi tiaa tiab tiar tiba tibi tiit tip- tipa tipi tipp tipt tira tirb tiri tirr tita titi titp titt tiva tivi tpap tpia tpir tppa tppp tppr tptp tptr traa trab trai trap trat trav tri- tria trib trip trit trpa trpp trpv trra trtr ttab ttbb tttt tvpa tvri tvrr tvtv vaar vaat vaia vair vait vapa vapb vapi vara vari varp varr vart vata vati vatt vava viar viii vipr vira virb viri virr virt vita viti vitt viva vivi vpat vrai vrap vrav vrba vria vt-i vtap vtpr vvpb vvvv