-ana aaaa aaab aaac aaad aaan aaas aaba aabb aabc aabd aaca aacb aacc aacd aacn aacs aada aadc aads aana aand aasa aasc aasd aass abaa abab abac abad aban abas abb- abba abbb abbs abca abcb abcc abcd abcn abcs abda abs- absa absd abss acaa acab acac acad acan acas acba acca accc accd accs acda acdb acdc acds acsa acsc acsd acss adaa adab adac adad adan adas adba adbc adcc adcs adda addc addd addn adds adna adns adsa adss ana- anaa anab anac anad anan anas anba anbb anca ancc and- anda ands anna annb anns ansa ansd asaa asab asac asad asan asas asba asc- asca ascb ascc asda asds asnc assa assc assd assn asss baaa baad baan baas baba babb babs bac- baca bacc bacn bacs bada badb badd bads bana banc band bann bans basa basc bass bbad bbas bbbb bbbs bbdd bcaa bcas bcbc bcbs bcca bccc bccs bcda bcds bcsa bcsc bcsn bcss bdbc bddc bdna bdsd bnas bnss bsaa bsac bsas bsbd bscs bsnd bsns bssc bssd c-cd caaa caab caac caan caas caba cabs cac- caca cacc cada cadc cadd cads cana canc cand cann cans casa casb casc casd cass cbac cbbc cbbs cbca cbcc cbcn cbcs cbdb cbdc cbdn 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 ccsa ccsd ccsn ccss cdaa cdac cdad cdba cdcs cdda cddb cdna cdnb cdnc cdss cnaa cnac cnas cnbc cnda cndd cnna cnsa cnss csaa csab csac csas cscb cscc cscd cscs csda csdb csdn cssa cssd d-na daab daad daan daas daba dabb dabs daca dacs dada dads dana dand dann dans dasa dasb dasc dasd dass dbas dbcc dbcs dbsa dbss dcas dcbc dcca dccb dccc dccs dcdb dcds dcns dcsc dcss dddd ddss dnaa dnab dnac dnad dnan dnas dncs dnsa dnsc dsac dsba dsbc dscc dscn dscs dsda dssa dssc dssn naaa naab naac naad naan naas naba nabc nabs naca nacc nacd nacs nada nadc nads nan- nana nanb nand nann nans nas- nasa nasb nasc nasd nass nbaa nbad nbas nbbc nbca nbcc nbcs ncaa ncac ncba ncbc ncbs ncca nccc nccn nccs ncda ncdc ncdn ncds ncna ncnc ncnd ncsa ncsc ncss ndaa ndas ndcc ndcs nddb ndna ndss nndb nnnn nnsa nnss nsaa nsac nsca nscc nscd nscs nsds nsna nssa nssb nssc nsss sa-c saab saac saad saan saas saba sabb sabc sabs saca sacc sacd sacn sacs sada sadb sadc sadd sads sana sand sann sans sasa sasc sasd sass sbaa sbac sbas sbbs sbca sbcc sbcs sbds sbsa sbsd scaa scab scac scad scan scas scba sccc sccs scda scdc scds scna scnd scsa scsc scsd scsn sdba sdcc sddc sdds sdna sdsc sdss snab snad snas snba snca sncc snda snns snsd ssaa ssab ssac ssan ssas ssbn ssca sscc sscs ssdc ssdd ssns sssa sssb sssc ssss