a-a a-b a-c a-t aaa aab aac aae aak aao aat ab- aba abb abc abe abk abo abt ac- aca acb acc ace ack aco act aea aeb aec aee aek aeo aet aka akb akc ake akk ako aoa aob aoc aoe aok aoo aot at- ata atb atc ate ato att baa bab bac bae bak bao bat bba bbb bbc bbe bbk bbo bbt bca bcb bcc bce bck bco bct be- bea beb bec bee bek beo bet bka bkb bkc bke bkk bko bkt boa bob boc boe bok boo bot bta btb btc bte btk bto btt c-- caa cab cac cae cak cao cat cba cbb cbc cbe cbk cbo cbt cca ccb ccc cce cck cco cct ce- cea ceb cec cee cek ceo cet cka ckb ckc cko ckt co- coa cob coc coe cok coo cot cta ctb ctc cte ctk cto ctt eaa eab eac eae eak eao eat eba ebb ebc ebe ebk ebo ebt ec- eca ecb ecc ece eck eco ect eea eeb eec eee eek eeo eet eka ekb ekc eke eko ekt eo- eoa eob eoc eoe eok eoo eot eta etb etc ete etk eto ett k-t ka- kaa kab kac kae kak kao kat kba kbb kbc kbe kbk kbo kca kcb kcc kce kck kct ke- kea keb kec kee kek keo ket kkb kkc kke kkk kkt koa kob koc koe kok koo kot kta ktb ktc kte ktk kto ktt oaa oab oac oae oak oao oat ob- oba obb obc obe obk obo obt oc- oca ocb occ ock oco oct oea oeb oec oee oeo oet oka okb okc oke okk oko oo- ooa oob ooc ook ooo oot ot- ota otb otc ote otk oto ott taa tab tac tae tak tao tat tba tbb tbc tbe tbk tbo tbt tca tcb tcc tce tck tco tct te- tea teb tec tee tek teo tet tka tkb tkc tke tkk tko tkt to- toa tob toc toe tok too tot tta ttb ttc tte ttk tto ttt

a-ak a-be a-ok aaaa aaab aaac aaae aaba aabb aabc aabt aaca aacb aacc aace aack aaco aact aaea aaec aaka aake aaoe aaoo aata aatc aatk aatt abaa abab abac abae abak abat abb- abba abbb abbe abbo abbt abca abcb abcc abct abec abee abet aboa abob abok aboo abot abta ac-t acaa acab acac acae acat acba acca accc acce acco acct ace- acea acec acek acet acke acoa acoe acot acta actc acte acto actt aeac aecb aect aeka aeta aetc aeto aett akaa akae akao akca akee akka akko akok akot akte aoba aoca aoce aotc at-t ataa atab atac atae atak atat atca atcc atck atco atea atec atee ateo atka atkt atob atoc atoe atok atot atta atte atto baaa baak baat baba babb babe babo bac- baca bacc bace back baco bact baek bak- baka bake bako bakt bata batc bate bato batt bbbb bbeb bbet bcaa bcat bcbc bcca bccc bcec bcet bctc beak beat beba bebb bebe bebo beca beck beeb beek beet beka beke beko beo- beok beot beta betc bete beto bett boab boac boak boat boba bobb bobe bobo boca boce bock boco boea boec boee boeo boet boka boke boko boob booc booe book boot bota botb bote boto bott btaa btcc btec btek btob bttb c-bo caaa caab caac caat caba cabe cabo cac- caca cacc cace cack caco caec caka cake cat- cata catb catc cate cato catt cbac cbat cbbc cbca cbcc cbce cbct cbea cbec cbee cbet cbka cbko cbot cbta cbtc ccaa ccab ccac ccat ccba ccbc ccca cccb cccc ccee ccob ccoc cctb cctc cctt ceac ceat ceba cec- ceca cece ceco cect ceeb ceec ceke cet- ceta cete ceto ckac ckat ckbc ckbe ckck ckco ckoa ckob ckoc ckoo ckot cktb coak coat coba cobb cobe cobo coca coce cock coco coct cok- coka coke coko coob cook coot cota cotb cotc cote coto cott ctab ctae ctba ctca ctec ctot ctta eaba eaca eacc eaec eata eate ebac ebba ebbc ebbo ebcc eboe eboo ecaa ecac ecao ecat ecbc ecbe ecca eccb eccc ecce ecco ecct ecka ecko eco- ecot ect- ecta ectc ecto eeca eeea eeee eeka eeke eeoc eeta eetc eete eka- ekab ekco ekeb ekek eket ekka ekoa ekta eoka eota eotc eoto etak etat etbc etcc etco etec etee etka etoe etok etta ette etto kaaa kaab kaak kaat kaba kabb kabc kabe kabo kacb kacc kace kaco kact kaeo kaet kaka kakc kake kakk kako kakt kaoa kaoc kaok kat- kata katb katc kate katk kato katt kbaa kbab kbac kbae kbak kbat kbba kbbb kbbc kbbe kbbk kbbo kbbt kbca kbcb kbce kbck kbco kbct kbeb kbec kbee kbek kbeo kbet kbkb kbkk kbko kboa kbob kboc kboe kbok kboo kbot kbta kbtb kbtc kbte kbtk kbto kbtt kcaa kcab kcac kcat kcba kcbc kcbk kcca kccb kccc kcck kcct kcea kceb kcec kcee kceo kcet kckc kckk kcko kcob kcoe kcot kcta kctb kctc kcte kcto kea- keak keat keba kebb kebc kebe kebt keca keck keco keek keet keka kekb kekc keke keko keok ket- keta ketc kete ketk keto kett kkaa kkac kkat kkba kkbb kkbe kkbo kkbt kkcb kkck kkco kkct kkea kkkk kkoa kkob kkoo kkot kktc kktk koab koac koae koak koba kobb kobc kobe kobk kobo koca kocb kock koct koea koka kokb kokc koke kokk koko koob kooc kook kooo koot kota kotb kotc kote kotk koto kott ktaa ktae ktak ktao ktat ktba ktbb ktbc ktbt ktcc ktce ktck ktco ktea ktec ktee ktek ktkb ktkc ktke ktkk ktko ktkt ktob ktoc ktoe ktok ktoo ktot kttc kttk ktto kttt o-eo oake oate obak obba obbo obea obec obet obkb oboe obok obot ocab ocac ocak ocat ocbc occa occc occt oce ocee ocet ocke oct- octa octe octo oec- oeca