a-ak a-ii aaaa aaab aaac aaad aaai aaba aabb aabc aabd aabi aabt aaca aacb aacc aacd aaci aack aact aada aadc aadi aadt aaib aaic aaii aaka aata aatc aatk aatt abaa abab abac abad abai abak abat abb- abba abbb abbi abbt abca abcb abcc abcd abci abct abda abdi abia abib abic abid abit abta ac-t acaa acab acac acad acai acat acba acca accc accd acci acct acda acdb acdc acdi acdt aci- acia acic acid ackd acta actc acti actt adaa adab adac adad adai adak adat adba adbc adbi adcc adci adda addc addd addi adia adib adic adik adit adki adta aiai aiba aica aicc aicd aida aidb aidc aidi aidt aiia aiib aiic aiid aika aiki aita aiti aitt akaa akai akca akia akid akik akka akki at-t ataa atab atac atad atai atak atat atca atcc atck atdi atdt atia atic atid atik atit atka atkt atta atti ba-i baaa baad baak baat baba babb babi bac- baca bacc baci back bact bada badb badd badi baia baib baic baid baik bait bak- baka baki bakt bata batc bati batt bbad bbbb bbci bbdd bcaa bcat bcbc bcca bccc bcci bcda bcia bcit bctc bdbc bddc bdii biad biak biat biba bibb bibi bica bicc bici bick bida bidi bita bitc bitd bitt btaa btcc btdt bttb c-cd caaa caab caac caat caba cabi cac- caca cacc caci cack cada cadc cadd cadi caia caib caic caid caik cait caka cat- cata catb catc catd cati catt cbac cbat cbbc cbca cbcc cbct cbdb cbdc cbdi cbia cbid cbit cbka cbta cbtc ccaa ccab ccac ccad ccai ccat ccba ccbc ccca cccb cccc ccci ccdc ccdi ccic ccid ccii cctb cctc cctt cdaa cdac cdad cdai cdba cdda cddb cdic cdii ciaa ciak ciat ciba cibc cibi cica cicc cici cict cida cidc cidi cidt ciia ciid ciii ciit cika cita citb citi citt ckac ckat ckbc ckbi ckck cktb ctab ctba ctbi ctca ctia ctic ctta daab daad daba dabb dabt daca daci dact dada dadi daia daid daik dait daka daki data dati datt dbcc dbit dbtt dcbc dcca dccb dccc dcci dcct dcdb dcia dcii dctc dddd dia- diab diac diad diak diat diba dibb dica dici dick dict dida didi diii dika diki dita diti ditt dkba dkdc dkid dtaa dtac dtcc dtki iaaa iaac iaai iaat iaba iaca iacc iact iadb iadc iadt iaia iata iatc iati ibac ibad ibat ibca ibia ibid ibtb ibtc icaa icab icac icad icai icat icbc icbd icca iccb iccc icci icct icdc icdd icta idad idat idca idda idia idic idid idta iiac iica iicd iida iiii iiit iita iitt ikat ikid ikki itaa itac itai itak itat itia itic itta k-ci k-id kaaa kaab kaai kaak kaat kaba kabb kabc kabd kabi kacb kacc kacd kaci kact kad- kada kadd kadi kadt kaia kaib kaic kaid kaii kaik kait kaka kakc kaki kakk kakt kat- kata katb katc katd kati katk katt kbaa kbab kbac kbad kbai kbak kbat kbba kbbb kbbc kbbd kbbi kbbk kbbt kbca kbcb kbci kbck kbct kbdb kbdi kbia kbib kbic kbid kbik kbit kbkb kbkk kbta kbtb kbtc kbtk kbtt kcaa kcab kcac kcad kcai kcat kcba kcbc kcbd kcbi kcbk kcca kccb kccc kccd kcci kcck kcct kcda kcdc kcdd kcdi kcic kcid kcii kcit kckc kckk kcta kctb kctc kcti kdaa kdab kdac kdad kdai kdak kdat kdbb kdbi kdca kdcc kdcd kddb kddc kddd kddi kddk kdia kdic kdka kdkb kdkd kdkk kdkt kdta kdtd kdti kiab kiac kiad kiai kiba kibb kibc kibi kibt kica kicb kicc kicd kick kict kida kidb kidd kidi kidk kiia kiic kiid kiii kiik kiit kika kikc kikd kiki kikk kikt kita kitc kiti kitt kkaa kkac kkai kkat kkba kkbb kkbd kkbi kkbt kkcb kkcd kkci kkck kkct kkda kkdc kkdd kkdt kkia kkic kkid kkik kkit kkkk kktc kktk ktaa ktai ktak ktat ktba ktbb ktbc ktbt ktcc ktck ktdb ktdc ktdd ktdk ktia ktib ktic ktik ktkb ktkc ktkk ktkt kttc ktti kttk kttt taa- taat taba tabb tabc tabi taca tacc taci tack tact tada taia taik tait taka taki takk takt tata tatb tati tatt tbca tbcb tbcc tbcd tbit tbta tcad tcca tccc tcdd tctc tdac tddb tiaa tiab tiba tibi tica ticc tick tidc tidd tiit tika tiki tita titc titi titt tkac ttab ttbb tttt