-ase aaaa aaac aaae aaaf aaas aaca aacc aace aacf aacs aaea aaec aaes aafa aafc aaff aasa aasc aase aasf aass acaa acac acae acas acca accc acce accf accs ace- acea acec aces acfc acfe acfs acsa acsc acse acss aeac aeaf aeas aesc aess afaa afca afcc afcs afee afes affa affc affs afsa afsc asaa asac asae asaf asas asc- asca ascc asce asea asec asee ases asfa assa assc asse asss caaa caac caaf caas cac- caca cacc cace caec caes cafa cafc cafe caff cafs casa casc case cass ccaa ccac ccaf ccas ccca cccc cccf cccs ccee ccfa ccfc ccff ccsa ccsf ccss ceac ceas cec- ceca cece cecs ceec cees cef- cefa cefc cesa cesc cese cess cfaa cfac cfae cfca cfcf cfcs cfsa cfse csaa csac csas cscc csce cscf cscs csea csec csee csfc cssa csse eaaf eaca eacc eaec easa ease ecaa ecac ecca eccc ecce ecef eces ecfa ecfc ecfs ecsa ecsc ecse ecss eeca eecs eeea eeee eees eefa eefe eese efas efca efes effa effs efsa esac esas esca esce escs esea esee eses esfs essa esse faaa faac faas faca facc face facs faes fafa fafc fafe faff fasa fasc fase fass fcas fcca fccf fces fcsc feaf feas fece fees fefc fefe feff fesa fese fess ffcc ffee ffff ffsa ffss fsas fscc fsec fssa fssc fssf sa-c saac saae saaf saas saca sacc sace sacs saes safa safc safe saff sasa sasc sase sasf sass scaa scac scaf scas sccc scce sccs scea scec scee scfa scfc scfe scsa scsc se-c se-e se-f se-s seaa seac seaf seas sec- seca secc sece secs seea seec seef sees sefa seff sesa sesc sese sess sfas sfca sfcc sfcs sffc sfss ssaa ssac ssas ssca sscc ssce sscs ssec ssee sses ssfc sssa sssc sssf ssss