-ase a-ak a-be aaaa aaab aaac aaae aaas aaba aabb aabc aaca aacb aacc aace aack aacs aaea aaec aaes aaka aake aasa aasc aase aass abaa abab abac abae abak abas abb- abba abbb abbe abbs abca abcb abcc abcs abec abee abes abs- absa abse abss acaa acab acac acae acas acba acca accc acce accs ace- acea acec acek aces acke acks acsa acsc acse acss aeac aeas aebs aecb aeka aesc aess akaa akae akas akca akee akes akka aksa asaa asab asac asae asak asas asba asc- asca ascb ascc asce asea asec asee asek ases aska aske asks assa assc asse assk asss baaa baak baas baba babb babe babs bac- baca bacc bace back bacs baek baes bak- baka bake baks basa basc base bask bass bbas bbbb bbbs bbeb bcaa bcas bcbc bcbs bcca bccc bccs bcec bces bcsa bcsc bcss beak beas beba bebb bebe beca beck becs beeb beek bees beka beke beks bes- besa bese besk bess bsaa bsac bsas bscs bsea bseb bsec bsee bses bssc bsse caaa caab caac caas caba cabe cabs cac- caca cacc cace cack caec caes caka cake casa casb casc case cask cass cbac cbbc cbbs cbca cbcc cbce cbcs cbea cbec cbee cbka cbsa cbsc cbse ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccs ccee ccsa ccss ceac ceas ceba cebs cec- ceca cece cecs ceeb ceec cees ceke cesa cesc cese cess ckac ckbc ckbe ckck ckcs cksa cksb csaa csab csac csak csas cscb cscc csce cscs csea csec csee cska csks cssa csse eaba eaca eacc eaec easa ease ebac ebba ebbc ebbs ebcc ebes ebsa ecaa ecac ecbc ecbe ecca eccb eccc ecce eces ecka ecks ecsa ecsc ecse ecss eeca eecs eeea eeee eees eeka eeke eeks eese eesk eka- ekab ekeb ekek ekes ekka esab esac esas esba esbs esca escb esce escs esea esee esek eses eska eske esks essa esse kaaa kaab kaak kaas kaba kabb kabc kabe kacb kacc kace kacs kaes kaka kakc kake kakk kaks kas- kasa kasb kasc kase kask kass kbaa kbab kbac kbae kbak kbas kbba kbbb kbbc kbbe kbbk kbbs kbca kbcb kbce kbck kbcs kbeb kbec kbee kbek kbes kbkb kbkk kbsa kbsb kbsk kbss kcaa kcab kcac kcas kcba kcbc kcbk kcbs kcca kccb kccc kcck kcea kceb kcec kcee kckc kckk kcsa kcsb kcsc kcse kcss kea- keak keas keba kebb kebc kebe keca keck keek kees keka kekb kekc keke keks kesa kesb kesc kesk kess kkaa kkac kkba kkbb kkbe kkbs kkcb kkck kkcs kkea kkkk kksa kkse kkss ksab ksac ksak ksas ksba ksbc ksbs ksca kscb ksce ksck kscs ksea ksec ksee ksek kska kskb kske kskk ksks kssa ksse ksss sa-c saab saac saae saak saas saba sabb sabc sabe sabs saca sacc sace sack sacs saeb saek saes saka sakb sake sakk saks sasa sasc sase sask sass sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbse scaa scab scac scak scas scba sccc scce sccs scea scec scee sck- scsa scsc se-c se-e se-k se-s seaa seab seac seak seas seba sebe sebs sec- seca secc sece seck secs seea seeb seec seek sees seka seke sekk sesa sesc sese sess skab skac skee skes skss ssaa ssab ssac ssas ssca sscc ssce sscs ssec ssee sses sssa sssb sssc ssss