a-ii aaaa aaab aaac aaad aaai aaar aaba aabb aabc aabd aabi aaca aacb aacc aacd aaci aacr aada aadc aadi aaib aaic aaii aara aarc aard aari abaa abab abac abad abai abar abb- abba abbb abbi abbr abca abcb abcc abcd abci abcr abda abdi abia abib abic abid abir abra abrc abri acaa acab acac acad acai acar acba acca accc accd acci acda acdb acdc acdi aci- acia acic acid acir acr- acra acrc acri acrr adaa adab adac adad adai adar adba adbc adbi adcc adci adda addc addd addi addr adia adib adic adir adra aiai aiba aica aicc aicd aicr aida aidb aidc aidi aidr aiia aiib aiic aiid aiir aira aird airi arab arac arad arai arar arba arbi arc- arca arci arda ardc ardi aria arib arid arii arr- arra arrc arri arrr ba-i baaa baad baar baba babb babi babr bac- baca bacc baci bada badb badd badi badr baia baib baic baid bair bar- bara barb barc bard bari barr bbad bbbb bbci bbdd bbrc bcaa bcar bcbc bcca bccc bcci bcda bcia bcra bd-r bdbc bddc bdii biad biar biba bibb bibi bica bicc bici bida bidi bidr bira birb bird biri birr brab brac brad brai brca brcb brda bria bric brid brrr c-cd caaa caab caac caba cabi cac- caca cacc caci cacr cada cadc cadd cadi cadr caia caib caic caid cair cara carb carc card cari carr cbac cbar cbbc cbca cbcc cbcr cbdb cbdc cbdi cbia cbid cbir cbrd ccaa ccab ccac ccad ccai ccar ccba ccbc ccca cccb cccc ccci ccdc ccdi ccdr ccic ccid ccii ccir ccra ccrc ccri cd-r cdaa cdac cdad cdai cdba cdda cddb cddr cdic cdii ciaa ciar ciba cibc cibi cica cicc cici cicr cida cidc cidi cidr ciia ciid ciii cira cirb circ ciri cirr crab crac crai crar crbc crca crcc crcr crda crdc cria crib cric daab daad daar daba dabb daca daci dada dadi daia daid dair dara darb darc dard dari darr dbar dbcc dcbc dcca dccb dccc dcci dcdb dcia dcii dcra dddd ddrc dia- diab diac diad diar diba dibb dica dici dida didi diii dira dird dirr draa drab drac drad drar drba drbc drca drda drib dric drra iaaa iaac iaai iaba iaca iacc iacr iadb iadc iaia iara iarc ibac ibad ibar ibca ibia ibid ibra ibrc ibrd ibri icaa icab icac icad icai icar icbc icbd icca iccb iccc icci iccr icdc icdd icra icrc icrr idad idar idca idcr idda idia idic idid idir idra idrc iiac iica iicd iida iiii iira iirc irac irad irai irar irca ircc ircd irda irdc iri- iria iric irid irra irrc irri raab raad raba rabb rabi rac- raca racc raci rada radc radd radr raia raic raid raii rair rara rarb rari rbbb rbbr rcac rcbc rccb rccc rcdc rcic rcid rcrd rdac riaa riab riad riai rib- riba rica ricc rida ridc ridd ridi riia riri rrad rrrr