a-ii aaaa aaab aaai aaar aaas aaba aabb aabi aaib aaii aais aaoo aara aari aaro aars aasa aasi aass abaa abab abai abar abas abb- abba abbb abbi abbo abbr abbs abia abib abir abis aboa abob aboo abor abos abra abri abro abrs abs- absa absi abss aiai aias aiba aibo aiia aiib aiir aioi aira airi airo airs aisa aisb aisi aiso aisr aoba aora aorb aors aoss arab arai arar aras arba arbi arbs aria arib arii ario aris aroa arob aroi aroo aror aros arr- arra arri arro arrr arrs ars- arsa arsi arso asaa asab asai asao asar asas asba asbo asia asii asio asir asis asob asoi asor asos asra asro asrs assa assi asso assr asss ba-i baaa baar baas baba babb babi babo babr babs baia baib baio bair bais baos bar- bara barb bari baro barr bars basa basi baso bass bbas bbbb bbbs biao biar bias biba bibb bibi bibo bibs biis bio- bioi bios bira birb biri biro birr birs bis- bisa biso biss boab boai boar boas boba bobb bobi bobo bobs boi- boii bois boob boor boos bor- bora bori boro borr bors bosa bosi boso boss brab brai brao bras bria brio bris broa brob broo bror bros brrr brrs brsb brsr bsaa bsas bsos bsra iaaa iaai iaas iaba iaia iais iara iars iasa iasi iaso iasr ibar ibas ibia ibis ibos ibra ibri ibro ibsa ibss iias iiii iiio iiis iioi iioo iios iira iirs iisi iisr ioba iobi ioii ioio iooi iooo ioos iora iori iors ioso irai irao irar iras iri- iria irio iris irob irra irri irrs irsa is-a isai isao isar isas isba isia isis iso- isor isos isra isri issa issi isso issr isss oais oara oars oasi oass obai obas obba obbo obia obis oboi obor obos obra obri obro obsr obss oiba oiii oios oira ooaa ooba oobi ooia oooo ooos oora oosa oosi orab orai orao orar oras orba orbb orbi orbo orbs ori- oria orio oris oro- oror oros orra orri orro orrs orsa orsi orso osai osar osas osba osia osii osis osoi osoo osor osos osro ossa ossb ossi osso raab raas raba rabb rabi rabo rabs raia raii rair rais raob raos rara rarb rari raro rars rasa rasi raso rass rbbb rbbr rbbs rbis rbss riaa riab riai rias rib- riba ribo ribs riia riis rios riri rirs risa risi riso riss roab roar roas rob- roba robb robi robo robs roia roio roir rois roob rooi roor roos rora rori roro rosa rosi roso ross rras rrrr rsaa rsai rsbi rsis rsos rssa s-ib s-ii s-os saab saar saas saba sabb sabi sabo sabr sabs saia sair sais saoi saor saos sara sari saro sarr sars sasa sasi saso sass sbaa sbai sbar sbas sbbs sbia sbor sbsa sbsi siaa siab siai sias siba sibi sibo sibs sior sios sira siri siro sirr sirs sisa sisi siss soar soas soba sobo sobr sobs soia soir sois soor soos sora sorb sori soro sorr sors sosa sosi soso soss sras srib sris sros ssaa ssab ssao ssas ssbr ssis ssra ssri ssrs sssa sssb sssi ssss