a-a a-b a-c aaa aab aac aak aam aao aar ab- aba abb abc abk abm abo abr ac- aca acb acc ack acm aco acr aka akb akc akk akm ako akr ama amb amc amk amm amo amr aoa aob aoc aok aom aoo aor ar- ara arb arc ark arm aro arr baa bab bac bak bam bao bar bba bbb bbc bbk bbm bbo bbr bca bcb bcc bck bcm bco bcr bka bkb bkc bkk bkm bko bkr bma bmb bmc bmk bmm bmo bmr boa bob boc bok bom boo bor bra brb brk brm bro brr c-- caa cab cac cak cam cao car cba cbb cbc cbk cbm cbo cbr cca ccb ccc cck ccm cco ccr cka ckb ckc ckm cko cma cmb cmc cmk cmm cmo cmr co- coa cob coc cok com coo cor cra crb crc crk crm cro crr ka- kaa kab kac kak kam kao kar kba kbb kbc kbk kbm kbo kbr kca kcb kcc kck kcm kcr kkb kkc kkk kkm kkr kma kmb kmc kmk kmm kmo koa kob koc kok kom koo kor kra krc krk kro krr m-o m-r maa mab mac mak mam mao mar mba mbb mbc mbk mbm mbo mbr mc- mca mcb mcc mck mcm mco mcr mka mkb mkc mkk mkm mko mkr mma mmb mmc mmk mmm mmo mmr moa mob moc mok mom moo mor mra mrb mrc mrk mrm mro mrr oaa oab oac oak oam oao oar ob- oba obb obc obk obm obo obr oc- oca ocb occ ock ocm oco ocr oka okb okc okk oko okr om- oma omb omc omm omo omr oo- ooa oob ooc ook oom ooo oor or- ora orb orc ork orm oro orr ra- raa rab rac rak ram rao rar rba rbb rbc rbk rbm rbo rbr rca rcb rcc rcm rco rcr rkb rkc rkk rkm rko rma rmb rmc rmm rmo rmr roa rob roc rok rom roo ror rra rrb rrc rrk rrm rrr

a-ak a-ok aaaa aaab aaac aaam aaar aaba aabb aabc aabm aaca aacb aacc aack aacm aaco aacr aaka aama aamb aamc aamo aamr aaoo aara aarc aarm aaro abaa abab abac abak abam abar abb- abba abbb abbo abbr abca abcb abcc abcr abma abmb abmc aboa abob abok aboo abor abra abrc abro acaa acab acac acar acba acca accc accm acco acma acmc acoa acom acor acr- acra acrc acrm acro acrr akaa akam akao akar akca akka akko akok akom akr- akra amaa amac amam amar amb- amba ambo ambr amca amcc amco amka amm- amma ammo amob amoc amok amoo amor amra amrc amro aoba aoca aoma aora aorb arab arac arak aram arar arba arc- arca arcm arco arka arko arma armc armm armo aroa arob arom aroo aror arr- arra arrc arrk arro arrr baaa baak baam baar baba babb babm babo babr bac- baca bacc back baco bak- baka bako bakr bama bamb bamc bamm bar- bara barb barc bark barm baro barr bbbb bbcm bbrc bcaa bcam bcar bcbc bcca bccc bccm bcma bcor bcra bmaa bmoc boab boac boak boar boba bobb bobo boca bock bocm boco boka boko boma bomb boob booc book boom boor bor- bora bork borm boro borr brab brac brak bram brao brca brcb brka brkb brmc broa brob broc brok brom broo bror brrm brrr c-bo caaa caab caac caam caba cabo cac- caca cacc cack cacm caco cacr caka cama camb camc camk camm camo caor cara carb carc cark carm caro carr cbac cbar cbbc cbca cbcc cbcm cbcr cbka cbkm cbko cbkr cbrm ccaa ccab ccac ccam ccar ccba ccbc ccca cccb cccc cccm cckm ccma ccmb ccmc ccmm ccob ccoc ccom ccra ccrc ckac ckbc ckck ckcm ckco ckmo ckoa ckob ckoc ckom ckoo ckor ckrc ckrm cmaa cmac cmba cmbc cmcc cmmb cmmc cmoc cmra cmrr coak coba cobb cobo coca cock coco cok- coka coko com- coma comb comc comm como comr coob cook coom cor- cora corb corc cork corm coro corr crab crac cram crar crbc crca crcc crcr crkc crmb crmo crob croc crok crom croo cror kaaa kaab kaak kaam kaar kaba kabb kabc kabo kabr kacb kacc kaco kaka kakc kakk kakm kako kam- kama kamb kamc kamm kamo kamr kaoa kaoc kaok kaor kara karb kark karm karo karr kbaa kbab kbac kbak kbam kbar kbba kbbb kbbc kbbk kbbm kbbo kbbr kbca kbcb kbck kbco kbcr kbkb kbkk kbko kbkr kbmb kbmc kbmo kbmr kboa kbob kboc kbok kboo kbra kbrb kbrc kbrk kbro kcaa kcab kcac kcam kcar kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kckc kckk kckm kcko kckr kcmb kcmc kcmk kcmm kcmo kcmr kcob kcom kcor kcrc kcro kcrr kkaa kkac kkam kkar kkba kkbb kkbo kkbr kkcb kkck kkcm kkco kkcr kkkk kkma kkmc kkmk kkmo kkmr kkoa kkob kkoo kkor kkrb kkrc kkrk kkro kkrr kmac kmak kmam kmbc kmbr kmca kmcb kmcc kmcm kmco kmcr kmkk kmko kmmk kmmm kmmo kmmr kmoa kmob kmoc kmok kmom kmor kmrb kmrc kmro kmrr koab koac koak koar koba kobb kobc kobk kobo kobr koca kocb kock kocm koka kokb kokc kokk koko kokr koma komb komc komo komr koob kooc kook kooo koor kora korb korc kork koro korr krab krac krak kram krar krba krbb krbk krbm krbr krca krcb krcc krcm krco krka krkc krkk krko krkr krma krmb krmc krmo krmr kroa krob kroc krok krom kroo kror krrb krrc krrk krrm krro krrr maaa maac maak maam maar maba mabo mac- maca macb macc mack maco macr maka mako mama mamc mamo maoc maor mar- mara marc mark marm maro marr mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mckk mcmc mcrc mkak mmaa mmab mmac mmar mmcc mmcm mmmc mmmm mmor mmrc moaa moab moac moam moar moba mobb mobo moca mock