a-a a-b a-c aaa aab aac aaf aak aao ab- aba abb abc abf abk abo ac- aca acb acc acf ack aco af- afa afb afc aff afk afo aka akb akc akk ako aoa aob aoc aof aok aoo baa bab bac baf bak bao bba bbb bbc bbf bbk bbo bca bcb bcc bcf bck bco bfa bfb bfc bff bfo bka bkb bkc bkf bkk bko boa bob boc bof bok boo c-- caa cab cac caf cak cao cba cbb cbc cbf cbk cbo cca ccb ccc ccf cck cco cfa cfb cfc cff cfk cfo cka ckb ckc cko co- coa cob coc cof cok coo faa fab fac faf fak fao fba fbb fbc fbf fbk fbo fca fcb fcc fcf fck fco ffa ffc fff ffk ffo fka fkb fkc fkf fkk foa fob foc fof fok foo ka- kaa kab kac kaf kak kao kba kbb kbc kbf kbk kbo kca kcb kcc kck kfa kfc kff kfo kkb kkc kkk koa kob koc kof kok koo oaa oab oac oaf oak oao ob- oba obb obc obf obk obo oc- oca ocb occ ocf ock oco of- ofa ofb ofc off ofo oka okb okc okk oko oo- ooa oob ooc oof ook ooo

a-ak a-ok aaaa aaab aaac aaaf aaba aabb aabc aaca aacb aacc aacf aack aaco aafa aafb aafc aaff aaka aaoo abaa abab abac abaf abak abb- abba abbb abbo abca abcb abcc abcf abff aboa abob abof abok aboo acaa acab acac acba acca accc accf acco acfc acoa afaa afak afao afca afcb afcc affa affc affo afka afoa afoo akaa akao akca akka akko akok aoba aoca baaa baaf baak baba babb babo bac- baca bacc back baco bafc baff bafo bak- baka bako bbbb bbfc bcaa bcbc bcca bccc bcfc bcof bfca boab boac boak boba bobb bobo boca bock boco bofa boff boka boko boob booc boof book c-bo caaa caab caac caaf caba cabf cabo cac- caca cacc cack caco cafa cafb cafc caff caka cbac cbbc cbca cbcc cbfb cbfc cbka cbko ccaa ccab ccac ccaf ccba ccbc ccca cccb cccc cccf ccfa ccfc ccff ccob ccoc cfaa cfab cfac cfao cfbc cfca cfcb cfcf cfco cffb cfoa ckac ckbc ckck ckco ckoa ckob ckoc ckoo coak coba cobb cobo coca cock coco cofc coff cok- coka coko coob coof cook f--k faaa faac faba fabo faca facc fack fafa fafc faff fafo fako fcab fcba fcca fccf ffcc ffff fkab foaf foak foba foca fock foco fofo foof fook kaaa kaab kaaf kaak kaba kabb kabc kabf kabo kacb kacc kaco kafa kafc kaff kaka kakc kakk kako kaoa kaoc kaok kbaa kbab kbac kbak kbba kbbb kbbc kbbf kbbk kbbo kbca kbcb kbck kbco kbfb kbfc kbff kbfk kbfo kbkb kbkf kbkk kbko kboa kbob kboc kbok kboo kcaa kcab kcac kcba kcbc kcbf kcbk kcca kccb kccc kcck kcfa kcfb kcfc kcfo kckc kckf kckk kcko kcob kcof kfab kfac kfbc kfbk kfcf kfco kffa kffb kfff kffk kfka kfkb kfok kfoo kkaa kkac kkba kkbb kkbo kkcb kkck kkco kkkk kkoa kkob kkoo koab koac koak koba kobb kobc kobk kobo koca kocb kocf kock kofa kofc koff kofk kofo koka kokb kokc kokf kokk koko koob kooc kook kooo oafc oafo obak obba obbo obkb obok ocab ocac ocak ocbc occa occc ocfa off- offa offc offo okak okka okko okok ooaa ooak ooba ooff oooo

-aaa- aaaoc aabaa aabba aacbc aacfo aakko abaab ababa abaca aback abaco abaka abako abbac abccc abfab abkoo aboab abobo abook acaca acacb acack acock acook akaba akabo akaoa akobo akoka akoko babak babka baboo bacab bacao bacca bacco back- backa backf baffa bakka bakoa bbook bcock bo-bo boaco bobac bobak bobko boboc bobok bocac bocao bocca bocka bocoa boffa boffo bokaa bokko bokok booba boock booco booko c-a-c ca-ca caaba cabob caboc cabok cacak cacao caco- cacoa caffa caffo caoba ccccc co-bo co-co cocao cocc- cocco cocka cocoa coffa cokak cokk- cooba fabbo faboo fcaca fofao k-a-o kaaba kabaa kabab kabak kabba kabob kafak kaffa kafka kakao kakka kakko kako- kaooa ko-ko kocab kocak kokab kokak kokka kokko kooba kooka obaba obock ofafa offof okaka okobo okoc ooooo

aaaaba abacab ackack aka-bo akbaba akkaba baabaa babaco bacaba backof bakoca baobab bbbbbb boabab boback bobfoc boccob bococa bocock booboo bookof caback cabook caccao cafcaf cakcak cobbob cocco- cococo cocofa cofaco coocoo cookoo fabao fakfak foboff foofoo kaback kabaka kabook kaffka kakkak koakoa kobaco kobako koboko koffka kokako kookoo oooooo

ack-ack afobaka babcock bac-cab bakaffa bbbbbbb bok-bok boo-boo boobook boocock bookcab cabback cookoff fakaofo foo-foo kacabac kakaako kocaoba kokocak kokocko o-o-a-a off-off offbook

akcakoca bbbbbbbb bo-bo-bo bookaboo cook-off cookbook off-book

abakabaka baabaabaa obabakoak

aaaaaaaaaaaaaaa bbbbbbbbbbbbbbb ccccccccccccccc