-vac a-ii a-iv aaaa aaab aaac aaad aaai aaav aaba aabb aabc aabd aabi aaca aacb aacc aacd aaci aacv aada aadc aadi aaib aaic aaii aava abaa abab abac abad abai abb- abba abbb abbi abca abcb abcc abcd abci abda abdi abia abib abic abid abva abvd acaa acab acac acad acai acba acca accc accd acci acda acdb acdc acdi aci- acia acic acid acvv adaa adab adac adad adai adba adbc adbi adcc adci adda addc addd addi adia adib adic advb advi aiai aiba aica aicc aicd aida aidb aidc aidi aiia aiib aiic aiid aiva aivd avab avcc avda avdi avia avic avid aviv avva ba-i baaa baad baba babb babi bac- baca bacc baci bada badb badd badi baia baib baic baid bava bavi bbad bbbb bbci bbdd bcaa bcbc bcca bccc bcci bcda bcia bdav bdbc bddc bdii biad biba bibb bibi bica bicc bici bida bidi bivi c-cd caaa caab caac caba cabi cac- caca cacc caci cada cadc cadd cadi caia caib caic caid cava cavi cbac cbbc cbca cbcc cbdb cbdc cbdi cbia cbid cbva cbvb ccaa ccab ccac ccad ccai ccba ccbc ccca cccb cccc ccci cccv ccdc ccdi ccic ccid ccii cciv ccvi cdaa cdac cdad cdai cdba cdda cddb cdic cdii cdiv cdvd cdvi ciaa ciba cibc cibi cica cicc cici cida cidc cidi ciia ciid ciii civa civc cvac cvca cvcc cvid cvii daab daad daba dabb daca daci dada dadi daia daid dava davi dbcc dcbc dcca dccb dccc dcci dccv dcdb dcia dcii dciv dcvd dcvi dddd dia- diab diac diad diba dibb dica dici dida didi diii diiv diva divd divi dvda dvi- dvii iaaa iaac iaai iaba iaca iacc iadb iadc iaia iava ibac ibad ibca ibia ibid icaa icab icac icad icai icbc icbd icca iccb iccc icci icdc icdd idad idca idda idia idic idid idvd iiac iica iicd iida iiii ivai ivbv ivda ivic vaad vaca vada vadi vaia vaid vava vbcc vcbi vcci vdcc viad vic- vica vici vida vidi viii viva vivi vvvv