a-ii aaaa aaab aaac aaai aaas aaba aabb aabc aabi aaca aacb aacc aaci aaco aacs aaib aaic aaii aais aaoo aasa aasc aasi aass abaa abab abac abai abas abb- abba abbb abbi abbo abbs abca abcb abcc abci abcs abia abib abic abis aboa abob aboo abos abs- absa absi abss acaa acab acac acai acas acba acca accc acci acco accs aci- acia acic acis acoa acos acsa acsc acsi acss aiai aias aiba aibo aica aicc aics aiia aiib aiic aioc aioi aisa aisb aisi aiso aoba aoca aocs aoss asaa asab asac asai asao asas asba asbo asc- asca ascb ascc asci asco asia asic asii asio asis asob asoc asoi asos assa assc assi asso asss ba-i baaa baas baba babb babi babo babs bac- baca bacc baci baco bacs baia baib baic baio bais baos basa basc basi baso bass bbas bbbb bbbs bbci bcaa bcas bcbc bcbs bcca bccc bcci bccs bcia bcis bcos bcsa bcsc bcss biao bias biba bibb bibi bibo bibs bica bicc bici bico bics biis bio- bioc bioi bios bis- bisa bisc biso biss boab boac boai boas boba bobb bobi bobo bobs boca boco bocs boi- boii bois boob booc boos bosa bosc bosi boso boss bsaa bsac bsas bsci bscs bsic bsos bssc c-bo caaa caab caac caas caba cabi cabo cabs cac- caca cacc caci caco caia caib caic caio cais caoi caos casa casb casc casi caso cass cbac cbbc cbbs cbca cbcc cbcs cbia cbsa cbsc cbsi ccaa ccab ccac ccai ccas ccba ccbc ccca cccb cccc ccci cccs ccic ccii ccis ccob ccoc ccsa ccsi ccss ciaa ciao cias ciba cibc cibi cibo cica cicc cici cico cics ciia ciii ciis ciob cios cis- cisa cisc ciss coai coas coba cobb cobi cobo cobs coca coco coia cois coob coos cosa cosc cosi coso coss csaa csab csac csao csas cscb cscc csci csco cscs csia csib csio csis csob csos cssa iaaa iaac iaai iaas iaba iaca iacc iacs iaia iais iasa iasc iasi iaso ibac ibas ibca ibcs ibia ibis ibos ibsa ibss icaa icab icac icai icao icas icbc icbs icca iccb iccc icci icco iccs icis icoc icos icsa icsb icsc icsi icss iiac iias iica iiii iiio iiis iioi iioo iios iisc iisi ioba iobi ioci ioii ioio iooi iooo ioos ioso is-a isac isai isao isas isba isca iscc isci isco iscs isia isic isis iso- isoc isos issa issc issi isso isss oaic oais oasc oasi oass obai obas obba obbo obia obis oboi obos obss ocab ocac ocas ocbc occa occc occi ocis ocos ocsa oiba oici oiii oios oisc ooaa ooba oobi ooia oooo ooos oosa oosi osai osas osba osca oscc osci osco osia osii osis osoi osoo osos ossa ossb ossi osso s-ib s-ic s-ii s-os sa-c saab saac saas saba sabb sabc sabi sabo sabs saca sacc saci saco sacs saia saic sais saoi saos sasa sasc sasi saso sass sbaa sbac sbai sbas sbbs sbca sbcc sbcs sbia sbic sbsa sbsi scaa scab scac scai scas scba scbi sccc sccs sci- scia scic scio scis scob scoo scsa scsc scsi scso siaa siab siac siai sias siba sibc sibi sibo sibs sica sicc sici sico sics sios sisa sisc sisi siss soas soba sobo sobs soca soci soco socs soia soic sois soos sosa sosi soso soss ssaa ssab ssac ssao ssas ssca sscc ssci sscs ssis ssoc sssa sssb sssc sssi ssss