a-ii aaaa aaab aaac aaad aaai aaal aaba aabb aabc aabd aabi aabl aaca aacb aacc aacd aaci aacl aada aadc aadi aaib aaic aaii aala aalc aald aali aall abaa abab abac abad abai abal abb- abba abbb abbi abca abcb abcc abcd abci abcl abda abdi abia abib abic abid abil abla acaa acab acac acad acai acba acbl acca accc accd acci acda acdb acdc acdi aci- acia acic acid acla aclc acli adaa adab adac adad adai adal adba adbc adbi adcc adci adda addc addd addi addl adia adib adic adli aiai aiba aibl aica aicc aicd aida aidb aidc aidi aiia aiib aiic aiid aila aild aili alaa alac alad alai alal alb- alba albc albi alca alcc ald- alda aldi aldl ali- alia alib alid alii alil all- alla alli alll ba-i baaa baad baal baba babb babi bac- baca bacc baci bada badb badd badi baia baib baic baid bail bala balc bald bali ball bbad bbbb bbci bbdd bblb bcaa bcbc bcca bccc bcci bccl bcda bcia bdbc bddc bdii biad bial biba bibb bibi bibl bica bicc bici bida bidi bila bild bili bill blaa blab blac blad bldc blic c-cd caaa caab caac caal caba cabi cac- caca cacc caci cada cadc cadd cadi caia caib caic caid cail cala calc cald cali call cbac cbal cbbc cbca cbcc cbcl cbdb cbdc cbdi cbia cbid cblb cblc ccaa ccab ccac ccad ccai ccba ccbc ccca cccb cccc ccci cccl ccdc ccdi ccic ccid ccii ccil ccla cclc ccli cdaa cdac cdad cdai cdba cdda cddb cddl cdic cdii cdli ciaa cial ciba cibc cibi cica cicc cici cida cidc cidi ciia ciid ciii cila cili cill clab clad clai clcd cldc clib clic clii daab daad daal daba dabb daca daci dada dadi daia daid dail dala dali dall dbcc dcbc dcca dccb dccc dcci dccl dcdb dcia dcii dcil dcli dddd ddlc dia- diab diac diad dial diba dibb dica dici dida didi diii dila dili dill dlab dlbd dlia dlib dlii dlil iaaa iaac iaai iaal iaba iaca iacc iadb iadc iaia iala iall ibac ibad ibca ibia ibid icaa icab icac icad icai ical icbc icbd icca iccb iccc icci iccl icdc icdd icdl icll idad idca idda idia idic idid idil idli iiac iica iicd iida iiii iila ilac ilal ilbc ilca ilcd ilia ilic ill- illa illd illi laaa laac laad laal laba labi laca lacc laci lacl lada ladd ladi laia laic laid lail lala lald lali lall lbcc lbia lcac lcad lcbc lcca lccc lcdd lcia ldci liac liba libc lica lida lidb lidl liia liii lila lilb lili lill llcc lldb lldc lllc llll