-ic a-a a-b a-c a-i a-t aaa aab aac aai aak aao aat ab- aba abb abc abi abk abo abt ac- aca acb acc aci ack aco act ai- aia aib aic aii aik aio ait aka akb akc aki akk ako aoa aob aoc aoi aok aoo aot at- ata atb atc ati ato att baa bab bac bai bak bao bat bba bbb bbc bbi bbk bbo bbt bca bcb bcc bci bck bco bct bi- bia bib bic bii bik bio bit bka bkb bkc bkk bko bkt boa bob boc boi bok boo bot bta btb btc bti btk bto btt c-- caa cab cac cai cak cao cat cba cbb cbc cbi cbk cbo cbt cca ccb ccc cci cck cco cct ci- cia cib cic cii cik cio cit cka ckb ckc cki cko ckt co- coa cob coc coi cok coo cot cta ctb ctc cti ctk cto ctt ia- iaa iab iac iai iao iat iba ibb ibc ibi ibk ibo ibt ica icb icc ici ick ico ict iia iib iic iii iio iit ika ikb ikc iki ikk iko ikt io- ioa iob ioc ioi ioo iot ita itb itc iti itk ito itt k-t ka- kaa kab kac kai kak kao kat kba kbb kbc kbi kbk kbo kca kcb kcc kci kck kct kia kib kic kii kik kio kit kkb kkc kki kkk kkt koa kob koc koi kok koo kot kta ktb ktc ktk kto ktt o-i oaa oab oac oai oak oao oat ob- oba obb obc obi obk obo obt oc- oca ocb occ oci ock oco oct oia oib oic oii oik oio oit oka okb okc oki okk oko oo- ooa oob ooc ooi ook ooo oot ot- ota otb otc oti otk oto ott taa tab tac tai tak tao tat tba tbb tbc tbi tbk tbo tbt tca tcb tcc tci tck tco tct tia tib tic tii tik tio tit tka tkb tkc tkk tko tkt to- toa tob toc toi tok too tot tta ttb ttc tti ttk tto ttt

a-ak a-ii a-ok aaaa aaab aaac aaai aaba aabb aabc aabi aabt aaca aacb aacc aaci aack aaco aact aaib aaic aaii aaka aaoo aata aatc aatk aatt abaa abab abac abai abak abat abb- abba abbb abbi abbo abbt abca abcb abcc abci abct abia abib abic abit aboa abob abok aboo abot abta ac-t acaa acab acac acai acat acba acca accc acci acco acct aci- acia acic acoa acot acta actc acti acto actt aiai aiba aibo aica aicc aiia aiib aiic aika aiki aiko aioc aioi aita aiti aitt akaa akai akao akca akia akik akio akka akki akko akok akot aoba aoca aoki aotc at-t ataa atab atac atai atak atat atca atcc atck atco atia atic atik atit atka atkt atob atoc atoi atok atot atta atti atto ba-i baaa baak baat baba babb babi babo bac- baca bacc baci back baco bact baia baib baic baik baio bait bak- baka baki bako bakt bata batc bati bato batt bbbb bbci bcaa bcat bcbc bcca bccc bcci bcia bcit bctc biak biao biat biba bibb bibi bibo bica bicc bici bick bico biko bio- bioc bioi biot bita bitc bito bitt boab boac boai boak boat boba bobb bobi bobo boca bock boco boi- boii boit boka boki boko boob booc book boot bota botb boti boto bott btaa btcc btob bttb c-bo caaa caab caac caat caba cabi cabo cac- caca cacc caci cack caco caia caib caic caik caio cait caka caoi cat- cata catb catc cati cato catt cbac cbat cbbc cbca cbcc cbct cbia cbit cbka cbko cbot cbta cbtc ccaa ccab ccac ccai ccat ccba ccbc ccca cccb cccc ccci ccic ccii ccob ccoc cctb cctc cctt ciaa ciak ciao ciat ciba cibc cibi cibo cica cicc cici cico cict ciia ciii ciit cika ciko ciob cita citb citi cito citt ckac ckat ckbc ckbi ckck ckco ckoa ckob ckoc ckoi ckoo ckot cktb coai coak coat coba cobb cobi cobo coca cock coco coct coia coit cok- coka coko coob cook coot cota cotb cotc coti coto cott ctab ctba ctbi ctca ctia ctic ctot ctta iaaa iaac iaai iaat iaba iaca iacc iact iaia iata iatc iati ibac ibat ibca ibia ibot ibtb ibtc icaa icab icac icai icao icat icbc icca iccb iccc icci icco icct icoc icta iiac iica iiii iiio iiit iioi iioo iita iitt ikat ikki ikko ikoo ioba iobi ioci ioii ioio ioit ioko iooi iooo iota ioto itaa itac itai itak itat itia itic itko itoi itoo itta itto k-ci kaaa kaab kaai kaak kaat kaba kabb kabc kabi kabo kacb kacc kaci kaco kact kaia kaib kaic kaii kaik kaio kait kaka kakc kaki kakk kako kakt kaoa kaoc kaoi kaok kat- kata katb katc kati katk kato katt kbaa kbab kbac kbai kbak kbat kbba kbbb kbbc kbbi kbbk kbbo kbbt kbca kbcb kbci kbck kbco kbct kbia kbib kbic kbik kbio kbit kbkb kbkk kbko kboa kbob kboc kboi kbok kboo kbot kbta kbtb kbtc kbtk kbto kbtt kcaa kcab kcac kcai kcat kcba kcbc kcbi kcbk kcca kccb kccc kcci kcck kcct kcic kcii kcit kckc kckk kcko kcob kcot kcta kctb kctc kcti kcto kiab kiac kiai kiba kibb kibc kibi kibo kibt kica kicb kicc kick kict kiia kiic kiii kiik kiit kika kikc kiki kikk kiko kikt kioa kioc kioi kiok kioo kiot kita kitc kiti kito kitt kkaa kkac kkai kkat kkba kkbb kkbi kkbo kkbt kkcb kkci kkck kkco kkct kkia kkic kkik kkit kkkk kkoa kkob kkoo kkot kktc kktk koab koac koai koak koba kobb kobc kobi kobk kobo koca kocb koci kock koct koii koit koka kokb kokc koki kokk koko koob kooc kooi kook kooo koot kota kotb kotc koti kotk koto kott ktaa ktai ktak ktao ktat ktba ktbb ktbc ktbt ktcc ktck ktco