a-a a-b a-c aaa aab aac aad aan aao aas ab- aba abb abc abd abn abo abs ac- aca acb acc acd acn aco acs ad- ada adb adc add adn ado ads an- ana anb anc and ann ano ans aoa aob aoc aod aon aoo aos as- asa asb asc asd asn aso ass baa bab bac bad ban bao bas bba bbb bbc bbd bbn bbo bbs bca bcb bcc bcd bcn bco bcs bda bdb bdc bdd bdo bds bna bnb bnc bnd bnn bno bns boa bob boc bod bon boo bos bsa bsb bsc bsd bsn bso bss c-- caa cab cac cad can cao cas cba cbb cbc cbd cbn cbo cbs cca ccb ccc ccd ccn cco ccs cda cdb cdc cdd cdn cdo cds cn- cna cnb cnc cnd cnn cno cns co- coa cob coc cod con coo cos csa csb csc csd csn cso css daa dab dac dad dan dao das dba dbb dbc dbd dbn dbo dbs dca dcb dcc dcd dcn dco dcs dda ddb ddc ddd ddn ddo dds dna dnb dnc dnd dnn dno dns doa dob doc dod don doo dos dsa dsb dsc dsd dsn dso dss naa nab nac nad nan nao nas nba nbb nbc nbd nbn nbo nbs nca ncb ncc ncd ncn nco ncs nda ndb ndc ndd ndn ndo nds nna nnb nnc nnn nno nns no- noa nob noc nod non noo nos nsa nsb nsc nsd nsn nso nss oaa oab oac oad oan oao oas ob- oba obb obc obd obn obo obs oc- oca ocb occ ocd ocn oco ocs oda odb odc odd odn odo ods on- ona onb onc ond onn ono ons oo- ooa oob ooc ood oon ooo oos os- osa osb osc osd osn oso oss saa sab sac sad san sao sas sba sbb sbc sbd sbn sbo sbs sca scb scc scd scn sco scs sda sdb sdc sdd sdn sdo sds sna snb snc snd snn sno sns soa sob soc sod son soo sos ss- ssa ssb ssc ssd ssn sso sss

-ana a-do aaaa aaab aaac aaad aaan aaas aaba aabb aabc aabd aaca aacb aacc aacd aacn aaco aacs aada aadc aads aana aand aaon aaoo aasa aasc aasd aass abaa abab abac abad aban abas abb- abba abbb abbo abbs abca abcb abcc abcd abcn abcs abda abdo aboa abob abod abon aboo abos abs- absa absd abss acaa acab acac acad acan acas acba acca accc accd acco accs acda acdb acdc acds acoa acod acon acos acsa acsc acsd acss adaa adab adac adad adan adao adas adba adbc adcc adcs adda addc addd addn addo adds adna adns adob adoc adod adon adoo ados adsa adso adss ana- anaa anab anac anad anan anao anas anba anbb anbo anca ancc anco and- anda ando ands anna annb anno anns ano- anoa anod anon anos ansa ansd anso aoba aoca aocs aonb aono aosd aoss asaa asab asac asad asan asao asas asba asbo asc- asca ascb ascc asco asda asdo asds asnc asno asob asoc asod ason asos assa assc assd assn asso asss baaa baad baan baas baba babb babo babs bac- baca bacc bacn baco bacs bada badb badd bado bads bana banc band bann bano bans baon baos basa basc baso bass bbad bbas bbbb bbbs bbdd bbdo bcaa bcas bcbc bcbs bcca bccc bccs bcda bcds bcos bcsa bcsc bcsn bcss bdbc bddc bdna bdos bdsd bnas bnoc bnss boab boac boad boan boas boba bobb bobo bobs boca boco bocs boda bodb bodo bods bona bonc bond bonn bono bons boob booc bood boon boos bosa bosc bosn boso boss bsaa bsac bsas bsbd bscs bsnd bsns bsod bson bsos bssc bssd c-bo c-cd caaa caab caac caan caas caba cabo cabs cac- caca cacc caco cada cadc cadd cado cads cana canc cand cann cano cans caod caos casa casb casc casd caso cass cbac cbbc cbbs cbca cbcc cbcn cbcs cbdb cbdc cbdn cbdo cbds cbna cbnd cbsa cbsc cbsn ccaa ccab ccac ccad ccas ccba ccbc ccbn ccca cccb cccc cccs ccdc ccdn ccds ccna ccnb ccnc ccns ccob ccoc ccod ccsa ccsd ccsn ccss cdaa cdac cdad cdba cdcs cdda cddb cdna cdnb cdnc cdon cdos cdss cnaa cnac cnas cnbc cnco cnda cndd cnna cnsa cnss coad coan coas coba cobb cobo cobs coca coco coda codd cods con- cona conc cond conn cono cons coob cood coon coos cosa cosc coso coss csaa csab csac csao csas cscb cscc cscd csco cscs csda csdb csdn csob csos cssa cssd d-bo d-na daab daad daan daas daba dabb dabo dabs daca dacs dada dado dads dana dand dann dano dans daon daos dasa dasb dasc dasd dass dbas dbcc dbcs dbos dbsa dbss dcas dcbc dcca dccb dccc dccs dcdb dcds dcns dcon dcos dcsc dcss dddd ddoc ddss dnaa dnab dnac dnad dnan dnas dncs dnoc dnsa dnsc doab doan doas doba dobb dobs doca doco docs dod- doda dodd dodo dods dona donc dond donn dono dons doob dood doon doos dosa doso doss dsac dsba dsbc dscc dscn dscs dsda dsoa dsos dssa dssc dssn naaa naab naac naad naan naas naba nabc nabo nabs naca nacc nacd naco nacs nada nadc nads nan- nana nanb nand nann nano nans naoc naos nas- nasa nasb nasc nasd naso nass nbaa nbad nbas nbbc nbbo nbca nbcc nbco nbcs ncaa ncac ncba ncbc ncbs ncca nccc nccn nccs ncda ncdc ncdn ncds ncna ncnc ncnd ncoa ncoc ncos ncsa ncsc ncss ndaa ndao ndas ndcc ndcs nddb nddo ndna ndoc ndos ndss nndb nnnn nnos nnsa nnss noaa noac noba nobc nobo nobs noco nocs noda nodo nods non- nona nonn nono nons noo- noob noon nooo noos nos- nosa noss nsaa nsac nsbo nsca nscc nscd nscs nsds nsna nsos nssa nssb nssc nsso