a-a a-b a-c aaa aab aac aah aak aao aas ab- aba abb abc abh abk abo abs ac- aca acb acc ach ack aco acs aha ahb ahc ahh ahk aho ahs aka akb akc akh akk ako aks aoa aob aoc aoh aok aoo aos as- asa asb asc ash ask aso ass baa bab bac bah bak bao bas bba bbb bbc bbh bbk bbo bbs bca bcb bcc bch bck bco bcs bha bhb bhc bhh bhk bho bhs bka bkb bkc bkk bko bks boa bob boc boh bok boo bos bsa bsb bsc bsh bsk bso bss c-- caa cab cac cah cak cao cas cba cbb cbc cbh cbk cbo cbs cca ccb ccc cch cck cco ccs ch- cha chb chc chh chk cho chs cka ckb ckc ckh cko cks co- coa cob coc coh cok coo cos csa csb csc csh csk cso css haa hab hac hah hak hao has hba hbb hbc hbh hbk hbo hbs hca hcb hcc hch hck hco hcs hha hhb hhc hhh hhk hho hhs hka hkb hkh hkk hko hks hoa hob hoc hoh hok hoo hos hsa hsb hsc hsh hsk hss ka- kaa kab kac kah kak kao kas kba kbb kbc kbh kbk kbo kbs kca kcb kcc kch kck kcs kha khh khk kho khs kkb kkc kkh kkk kks koa kob koc koh kok koo kos ksa ksb ksc ksh ksk kso kss oaa oab oac oah oak oao oas ob- oba obb obc obh obk obo obs oc- oca ocb occ och ock oco ocs oha ohc ohh oho ohs oka okb okc okk oko oks oo- ooa oob ooc ooh ook ooo oos os- osa osb osc osh osk oso oss saa sab sac sah sak sao sas sba sbb sbc sbh sbk sbo sbs sca scb scc sch sck sco scs sh- sha shb shc shh shk sho shs sk- ska skb skc skh skk sko sks soa sob soc soh sok soo sos ss- ssa ssb ssc ssh ssk sso sss

a-ak a-ha a-ok aaaa aaab aaac aaah aaas aaba aabb aabc aabh aaca aacb aacc aach aack aaco aacs aaha aahk aahs aaka aaoo aasa aasc aass abaa abab abac abak abas abb- abba abbb abbo abbs abca abcb abcc abch abcs abha abho abhs aboa abob aboh abok aboo abos abs- absa abss acaa acab acac acas acba acca accc acch acco accs acha achh acho achs acks acoa acoh acos acsa acsc acss ahab ahac ahah ahas ahha ahhs ahoa ahok ahsa ahso ahss akaa akah akao akas akca akha akhs akka akko akok akos aksa aoah aoba aoca aocs aoks aoss asaa asab asac asah asak asao asas asba asbo asc- asca ascb ascc asch asco asha ashk ashs aska asko asks asob asoc asok asos assa assc assh assk asso asss baaa baah baak baas baba babb babo babs bac- baca bacc bach back baco bacs baha baho bahs bak- baka bakh bako baks baoh baos basa basc bash bask baso bass bbas bbbb bbbs bbch bbhs bcaa bcas bcbc bcbs bcca bccc bccs bchs bcos bcsa bcsc bcss bhao bhca bhcc bhhs bkhs boab boac boak boas boba bobb bobo bobs boca boch bock boco bocs boha boho bohs boka boko boks boob booc booh book boos bosa bosc bosh bosk boso boss bsaa bsac bsas bscs bshs bsos bssc c-bo caaa caab caac caah caas caba cabo cabs cac- caca cacc cach cack caco caha cahs caka caos casa casb casc cash cask caso cass cbac cbbc cbbs cbca cbcc cbcs cbha cbhs cbka cbko cbsa cbsc ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccs ccha cchs ccob ccoc ccsa ccss chaa chab chac chah chak chao chas chca chch chcs chha chhs chka chkb chks choc choh chok choo chos chsc chsh ckac ckbc ckch ckck ckco ckcs ckhs ckoa ckob ckoc ckoo ckos cksa cksb cksh ckso coak coas coba cobb cobh cobo cobs coca coch cock coco coha coho cohs cok- coka coko coob cooh cook coos cosa cosc cosh coso coss csaa csab csac csak csao csas cscb cscc csch csco cscs cshs cska csks csob csos cssa haab haak haas haba habo habs hack haco hacs haha haho hahs haka hakk hako haks hasa hasc hash hask hass hbbs hbhs hboc hbos hbss hcbc hcbs hcca hccb hccc hcch hccs hchs hcsa hcsc hcso hcss hhaa hhhh hhhs hkcc hkcs hoac hoas hoba hobo hobs hoca hoch hock hocs hoha hoho hoka hoko hoks hook hoos hosa hosh hoss hsac hsas hsbc hscc hshs hsob k-os kaaa kaab kaak kaas kaba kabb kabc kabo kacb kacc kach kaco kacs kaha kahc kaho kahs kaka kakc kakh kakk kako kaks kaoa kaoc kaok kaos kas- kasa kasb kasc kash kask kaso kass kbaa kbab kbac kbak kbas kbba kbbb kbbc kbbk kbbo kbbs kbca kbcb kbch kbck kbco kbcs kbhb kbhc kbhh kbhs kbkb kbkk kbko kboa kbob kboc kbok kboo kbos kbsa kbsb kbsk kbso kbss kcaa kcab kcac kcah kcas kcba kcbc kcbk kcbs kcca kccb kccc kcck kcha kchh kchk kcho kchs kckc kckk kcko kcob kcoh kcos kcsa kcsb kcsc kcss khab khac khak khao khas khbc khbs khca khcb khcc khch khck khcs khhk khho khhs khka khkk khks khoa khob khoc khok khss kkaa kkac kkba kkbb kkbo kkbs kkcb kkch kkck kkco kkcs kkha kkhb kkhh kkhk kkkk kkoa kkob kkoh kkoo kksa kkss koab koac koak koas koba kobb kobc kobk kobo kobs koca kocb koch kock kocs koha kohh koho kohs koka kokb kokc kokh kokk koko koks koob kooc kook kooo koos kos- kosa kosb kosc kosh koso koss ksab ksac ksah ksak ksas ksba ksbc ksbh ksbs ksca kscb ksch ksck ksco kscs ksha kshb kshk ksho kshs kska kskb kskk ksko ksks ksob ksoc ksok ksoo ksos kssa ksso ksss oahs oaks oasc oass obak obas obba obbo