a-ii aaaa aaab aaai aaap aaar aaba aabb aabi aabp aaib aaii aapa aapi aara aari aarp abaa abab abai abaj abap abar abb- abba abbb abbi abbr abia abib abir abpa abpi abpp abpr abra abri aiai aiba aiia aiib aiir aija aipa aipi aira airi airp ajab ajar ajba ajpa ajri apai apap apar apba apbr api- apia apip appa appr apra apri arab arai arap arar arba arbi aria arib arii arij arip arja arpa arpi arr- arra arri arrr ba-i baaa baar baba babb babi babr baia baib bair baja baji bapa bapi bapp bar- bara barb bari barr bbbb bbpr biaj biap biar biba bibb bibi bija biji bipa bipp bira birb biri birr bpai brab brai braj bria brrr iaaa iaai iaap iaba iaia iapa iapp iara ibar ibia ibra ibri iiii iipa iira ijji ipba ippa ippr ipri irai iraj irap irar irbp iri- iria irip irpa irra irri jaap jaar jaba jabi jabr jaip jair jaja jaji japa japi japp jara jari jarp jarr jbaa jbar jibb jibi jiji jira jiri jjap jjar jpip jrbr paap paar paba paia paib paip pair paja papa papb papi papp papr par- para pari parp parr pbar pbpa piai pibb pibi piia piip pipa pipi pipp pira piri pirr ppap ppar ppib pppa pppp prai praj prar pri- pria prii prri raab raaj raba rabb rabi raia raii raip rair raja raji rapa rapi rapp rara rarb rari rbbb rbbr rbpj riaa riab riai rib- riba riia riji rijp ripa ripi ripp ripr riri rpii rrrr