a-a a-b a-c a-z aaa aab aac aak aao aar aaz ab- aba abb abc abk abo abr abz ac- aca acb acc ack aco acr acz aka akb akc akk ako akr aoa aob aoc aok aoo aor ar- ara arb arc ark aro arr arz az- aza azb azo azz baa bab bac bak bao bar baz bba bbb bbc bbk bbo bbr bca bcb bcc bck bco bcr bcz bka bkb bkc bkk bko bkr boa bob boc bok boo bor boz bra brb brk bro brr brz bza bzo bzr bzz c-- caa cab cac cak cao car caz cba cbb cbc cbk cbo cbr cbz cca ccb ccc cck cco ccr ccz cka ckb ckc cko co- coa cob coc cok coo cor coz cra crb crc crk cro crr crz cz- czc czk czo k-z ka- kaa kab kac kak kao kar kaz kba kbb kbc kbk kbo kbr kbz kca kcb kcc kck kcr kkb kkc kkk kkr koa kob koc kok koo kor koz kra krc krk kro krr kzo oaa oab oac oak oao oar ob- oba obb obc obk obo obr oc- oca ocb occ ock oco ocr ocz oka okb okc okk oko okr oo- ooa oob ooc ook ooo oor or- ora orb orc ork oro orr orz oza ozo ozz ra- raa rab rac rak rao rar raz rba rbb rbc rbk rbo rbr rca rcb rcc rco rcr rkb rkc rkk rko rkz roa rob roc rok roo ror roz rra rrb rrc rrk rrr rza rzb rzo zaa zab zac zak zao zar zaz zbb zbc zbr zco zka zo- zoa zob zoc zok zoo zor zro zzr zzz

a-ak a-ok aaaa aaab aaac aaar aaba aabb aabc aaca aacb aacc aack aaco aacr aaka aaoo aara aarc aaro abaa abab abac abak abar abb- abba abbb abbo abbr abca abcb abcc abcr aboa abob abok aboo abor abra abrc abro abza acaa acab acac acar acba acca accc acco acoa acor acr- acra acrc acro acrr akaa akao akar akca akka akko akok akr- akra aoba aoca aora aorb arab arac arak arar arba arc- arca arco arka arko aroa arob aroo aror aroz arr- arra arrc arrk arro arrr arza arzo aza- azab azar azaz azca azo- azoo azor azra azza azzo baaa baak baar baaz baba babb babo babr bac- baca bacc back baco bacz bak- baka bako bakr bar- bara barb barc bark baro barr barz baza bazo bbbb bbrc bcaa bcar bcbc bcca bccc bcor bcoz bcra boab boac boak boar boaz boba bobb bobo boca bock boco boka boko boob booc book boor booz bor- bora bork boro borr borz boza bozo brab brac brak brao braz brca brcb brka brkb broa brob broc brok broo bror broz brrr brza bzrk bzzz c-bo caaa caab caac caba cabo cac- caca cacc cack caco cacr caka caor caoz cara carb carc cark caro carr caza cazo cbac cbar cbbc cbca cbcc cbcr cbka cbko cbkr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccob ccoc ccra ccrc ckac ckbc ckck ckco ckoa ckob ckoc ckoo ckor ckrc coak coba cobb cobo coca cock coco cok- coka coko coob cook cor- cora corb corc cork coro corr cozz crab crac crar crbc crca crcc crcr crcz crkc crob croc crok croo cror croz czar kaaa kaab kaak kaar kaba kabb kabc kabo kabr kabz kacb kacc kaco kacz kaka kakc kakk kako kaoa kaoc kaok kaor kara karb kark karo karr karz kaza kazc kazo kazr kazz kbaa kbab kbac kbak kbar kbaz kbba kbbb kbbc kbbk kbbo kbbr kbbz kbca kbcb kbck kbco kbcr kbcz kbkb kbkk kbko kbkr kbkz kboa kbob kboc kbok kboo kboz kbra kbrb kbrc kbrk kbro kbrz kbzc kbzo kbzz kcaa kcab kcac kcar kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kckc kckk kcko kckr kckz kcob kcor kcoz kcrc kcro kcrr kcrz kczo kczz kkaa kkac kkar kkba kkbb kkbo kkbr kkbz kkcb kkck kkco kkcr kkkk kkoa kkob kkoo kkor kkoz kkrb kkrc kkrk kkro kkrr kkrz kkzz koab koac koak koar koaz koba kobb kobc kobk kobo kobr koca kocb kock koka kokb kokc kokk koko kokr kokz koob kooc kook kooo koor kooz kora korb korc kork koro korr koza kozb kozk kozo kozr krab krac krak krar kraz krba krbb krbk krbr krbz krca krcb krcc krco krka krkc krkk krko krkr krkz kroa krob kroc krok kroo kror kroz krrb krrc krrk krro krrr krrz krza krzk krzr krzz kzar kzaz kzbb kzbk kzbr kzbz kzcr kzkr kzkz kzoo kzor kzoz kzrb kzrc kzrk kzro kzrr kzrz kzza kzzb kzzk kzzo kzzr kzzz oara obak obba obbo obkb obok obor obra obro ocab ocac ocak ocbc occa occc ocra ocro ocrr okak okaz okka okko okok okor okra okro ooaa ooak ooba oocr oooo oora orab orac orak orao orar orba orbb orbo orca orco orka orko oro- orok oror oroz orra orro orzk orzo ozar raab raak raaz raba rabb rabk rabo rac- raca racc rack raco raka rakk raob raoc raok rara rarb rark raro rarz raza razo razr razz rbbb rbbr rcac rcbc rcbo rccb rccc roab roak roar rob- roba robb robo roca rocc rock roco roka rokk roko rokr roob rook roor rooz rora rorc rork roro roza rozz rrrr rzab rzka z-ro zaar zaba zabo zabr zaca zack zaka zakk zara zarb zark zaro zarr zaza zbar zcar zoar zobo zoco zoo- zook zora zorb zorc zork zoro zoza zozo zzzz

-aaa- aaaoc aaarc aabaa aabba aabra aacbc aakko abaab ababa abaca aback abaco abaka abako abara abaza abbac abbar abccc abkar abkoo aboab abobo abook abora aborc abrac abrak abrar abzac abzar acaca acacb acack acar- acara accra acock acook acork acrab acro- acrob akaba akabo akaoa akaza akbar akkra akobo akoka akoko akrak akrar akro- ar-ab ara-c arab- araba arabo araca arack araco araoz arara arbab arbar arbaz