a-a a-b a-c aaa aab aac aak aao aar aay ab- aba abb abc abk abo abr aby ac- aca acb acc ack aco acr acy aka akb akc akk ako akr aoa aob aoc aok aoo aor ar- ara arb arc ark aro arr ary ay- aya ayc ayk ayo ayr baa bab bac bak bao bar bay bba bbb bbc bbk bbo bbr bby bca bcb bcc bck bco bcr bcy bka bkb bkc bkk bko bkr boa bob boc bok boo bor boy bra brb brk bro brr bry by- bya byc byk byo byr c-- caa cab cac cak cao car cay cba cbb cbc cbk cbo cbr cby cca ccb ccc cck cco ccr cka ckb ckc cko cky co- coa cob coc cok coo cor coy cra crb crc crk cro crr cry cya cyb cyc cyk cyo cyr ka- kaa kab kac kak kao kar kay kba kbb kbc kbk kbo kbr kca kcb kcc kck kcr kkb kkc kkk kkr kky koa kob koc kok koo kor koy kra krc krk kro krr kry kya kyc kyo kyr oaa oab oac oak oao oar ob- oba obb obc obk obo obr oby oc- oca ocb occ ock oco ocr oka okb okc okk oko okr oo- ooa oob ooc ook ooo oor or- ora orb orc ork oro orr ory oya oyo ra- raa rab rac rak rao rar ray rba rbb rbc rbk rbo rbr rca rcb rcc rco rcr rkb rkc rkk rko rky roa rob roc rok roo ror roy rra rrb rrc rrk rrr ry- rya ryc ryk ryo ryr ryy yaa yab yac yak yao yar yay ybc ybr yby yca ycc yco ycy yka ykk yob yoc yok yoo yor yoy yra yrc yro yyb yyc yyy

a-ak a-ok a-ya a-yo aaaa aaab aaac aaar aaba aabb aabc aaby aaca aacb aacc aack aaco aacr aacy aaka aaoo aara aarc aaro abaa abab abac abak abar abay abb- abba abbb abbo abbr abby abca abcb abcc abcr aboa abob abok aboo abor aboy abra abrc abro abry abyc abyy acaa acab acac acar acba acca accc acco accy acoa acor acoy acr- acra acrc acro acrr acry akaa akao akar akay akca akka akko akok akr- akra akyr aoba aoca aora aorb arab arac arak arar aray arba arby arc- arca arco arka arko arky aroa arob aroo aror arr- arra arrc arrk arro arrr arry ary- arya aryk ay-o ayao ayar ayay ayca ayoo ayra ayrk ayry ayya baaa baak baar baba babb babo babr baby bac- baca bacc back baco bak- baka bako bakr bar- bara barb barc bark baro barr bary baya bayo bbay bbbb bboy bbrc bbyo bcaa bcar bcbc bcca bccc bcor bcra bkcy bkry boab boac boak boar boba bobb bobo boby boca bock boco boka boko boob booc book boor bor- bora bork boro borr bory boya boyo brab brac brak brao bray brca brcb brka brkb broa brob broc brok broo bror brrr bry- brya bryk bryo byar byck byoa byob byoc byrk c-bo caaa caab caac caba cabo caby cac- caca cacc cack caco cacr caka caky caor cara carb carc cark caro carr cary cayo cayr cbac cbar cbbc cbca cbcc cbcr cbka cbko cbkr cbry ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccob ccoc ccra ccrc ckac ckbc ckck ckco ckcy ckoa ckob ckoc ckoo ckor ckoy ckrc ckry coak coba cobb cobo coby coca cock coco cok- coka coko coky coob cook cor- cora corb corc cork coro corr cory coya coyo coyr crab crac crar cray crbc crca crcc crcr crkc crob croc crok croo cror croy cry- crya cryb cryo cya- cyaa cyar cyba cybb cybc cybo cyc- cyca cycb cycc cyoa cyra cyrk cyy- cyyc kaaa kaab kaak kaar kaay kaba kabb kabc kabo kabr kaby kacb kacc kaco kacy kaka kakc kakk kako kaoa kaoc kaok kaor kara karb kark karo karr kary kaya kayo kbaa kbab kbac kbak kbar kbay kbba kbbb kbbc kbbk kbbo kbbr kbca kbcb kbck kbco kbcr kbcy kbkb kbkk kbko kbkr kbky kboa kbob kboc kbok kboo kbra kbrb kbrc kbrk kbro kbry kbya kbyb kbyo kbyr kcaa kcab kcac kcar kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kccy kckc kckk kcko kckr kcky kcob kcor kcrc kcro kcrr kcry kcya kcyk kcyy kkaa kkac kkar kkay kkba kkbb kkbo kkbr kkcb kkck kkco kkcr kkcy kkkk kkoa kkob kkoo kkor kkoy kkrb kkrc kkrk kkro kkrr kkya kkyc kkyy koab koac koak koar koay koba kobb kobc kobk kobo kobr koby koca kocb kock koka kokb kokc kokk koko kokr koky koob kooc kook kooo koor kora korb korc kork koro korr koya koyo koyy krab krac krak krar kray krba krbb krbk krbr krca krcb krcc krco krka krkc krkk krko krkr krky kroa krob kroc krok kroo kror kroy krrb krrc krrk krro krrr krry kryk kryo kryy kyaa kyak kyar kyay kyba kybb kybc kybo kybr kyby kyca kycc kyck kycr kyka kykc kykk kykr kyky kyok kyoo kyor kyoy kyra kyrc kyrk kyro kyya kyyk kyyo kyyy oaky oara oary obak obay obba obbo obby obkb obok obor oboy obra obro ocab ocac ocak ocbc occa occc ocra ocro ocrr okak okay okby okka okko okok okor okra okro okyo ooaa ooak ooba ooby oocr ooky oooo oora oory orab orac orak orao orar oray orba orbb orbo orby orca orco orka orko oro- orok oror oroy orra orro orry orya oyak raab raak raba rabb rabk rabo raby rac- raca racc rack raco racy raka rakk raob raoc raok rara rarb rark raro rary raya rayk rayr rbbb rbbr rcac rcbc rcbo rccb rccc rcyc roab roak roar rob- roba robb robo roby roca rocc rock roco roka rokk roko rokr roky roob rook roor rora rorc rork roro rory roya rrrr ryba ryck ryob yaak yaar yaba yabo yacc yack yaco yacy yaka