a-ii aaaa aaab aaac aaad aaai aaba aabb aabc aabd aabi aaca aacb aacc aacd aaci aada aadc aadi aaib aaic aaii abaa abab abac abad abag abai abb- abba abbb abbi abca abcb abcc abcd abci abda abdi abgd abia abib abic abid abig acaa acab acac acad acag acai acba acca accc accd acci acda acdb acdc acdi acga acgi aci- acia acic acid adaa adab adac adad adag adai adba adbc adbi adcc adci adda addc addd addi adia adib adic adig agac agad agag agai agba agca agcc agda agga aggi agia agib agic agid agig agii aiai aiba aica aicc aicd aida aidb aidc aidi aiga aiia aiib aiic aiid ba-i baaa baad baba babb babi bac- baca bacc baci bada badb badd badi baga bagg bagi baia baib baic baid baig bbad bbbb bbci bbdd bbga bcaa bcbc bcbg bcca bccc bcci bcda bcia bdbc bddc bdii bgca bgia biad biba bibb bibi bica bicc bicg bici bida bidi biga bigb bigc bigd bigg c-cd caaa caab caac caba cabg cabi cac- caca cacc caci cada cadc cadd cadi caga cagg cagi caia caib caic caid cbac cbbc cbca cbcc cbdb cbdc cbdi cbga cbgb cbia cbid ccaa ccab ccac ccad ccag ccai ccba ccbc ccca cccb cccc ccci ccdc ccdi ccga ccgc ccic ccid ccii cdaa cdac cdad cdai cdba cdda cddb cdic cdii cgac cgcc cgcg ciaa ciba cibc cibi cica cicc cici cida cidc cidg cidi ciga cigi ciia ciid ciii daab daad daag daba dabb daca daci dada dadi daga dagg dagi daia daid daig dbag dbcc dcbc dcca dccb dccc dcci dcdb dcia dcii dddd dgac dgca dgia dia- diab diac diad diag diba dibb dica dici dida didi diga digg digi diii gaba gabb gabi gada gadd gadi gaga gagg gagi gaia gaid gaig gbag gc-c gcaa gcbc gccc gcda gcic gcii gdca gdci gddb gggg giaa giac giad giai giba gibb gica gida gidc gidd gidi giga gigg gigi iaaa iaac iaai iaba iaca iacc iadb iadc iaia ibac ibad ibca ibga ibia ibid icaa icab icac icad icag icai icbc icbd icca iccb iccc icci icdc icdd icga icgc idad idca idda idia idic idid idig igac igad igba igbc igcc igga igia iiac iica iicd iida iiii