-ic a-a a-b a-c a-i aaa aab aac aad aaf aai aas ab- aba abb abc abd abf abi abs ac- aca acb acc acd acf aci acs ad- ada adb adc add adf adi ads af- afa afb afc afd aff afi afs ai- aia aib aic aid aif aii ais as- asa asb asc asd asf asi ass baa bab bac bad baf bai bas bba bbb bbc bbd bbf bbi bbs bca bcb bcc bcd bcf bci bcs bda bdb bdc bdd bdf bdi bds bfa bfb bfc bfd bff bfi bfs bi- bia bib bic bid bif bii bis bsa bsb bsc bsd bsf bsi bss c-- caa cab cac cad caf cai cas cba cbb cbc cbd cbf cbi cbs cca ccb ccc ccd ccf cci ccs cda cdb cdc cdd cdf cdi cds cfa cfb cfc cfd cff cfi cfs ci- cia cib cic cid cif cii cis csa csb csc csd csf csi css daa dab dac dad daf dai das dba dbb dbc dbd dbf dbi dbs dca dcb dcc dcd dcf dci dcs dda ddb ddc ddd ddf ddi dds dfa dfb dfc dfd dff dfi dfs di- dia dib dic did dif dii dis dsa dsb dsc dsd dsf dsi dss faa fab fac fad faf fai fas fba fbb fbc fbd fbf fbi fbs fca fcb fcc fcd fcf fci fcs fda fdb fdc fdd fdf fdi fds ffa ffc ffd fff ffi ffs fia fib fic fid fif fii fis fsa fsb fsc fsd fsf fsi fss i-d i-f ia- iaa iab iac iad iaf iai ias iba ibb ibc ibd ibf ibi ibs ica icb icc icd icf ici ics ida idb idc idd idf idi ids ifa ifb ifc ifd iff ifi ifs iia iib iic iid iif iii iis is- isa isb isc isd isf isi iss saa sab sac sad saf sai sas sba sbb sbc sbd sbf sbi sbs sca scb scc scd scf sci scs sda sdb sdc sdd sdf sdi sds sfa sfb sfc sfd sff sfi sfs sia sib sic sid sif sii sis ss- ssa ssb ssc ssd ssf ssi sss

a-ii aaaa aaab aaac aaad aaaf aaai aaas aaba aabb aabc aabd aabi aaca aacb aacc aacd aacf aaci aacs aada aadc aadi aads aafa aafb aafc aafd aaff aafi aaib aaic aaii aais aasa aasc aasd aasf aasi aass abaa abab abac abad abaf abai abas abb- abba abbb abbi abbs abca abcb abcc abcd abcf abci abcs abda abdi abff abia abib abic abid abis abs- absa absd absf absi abss acaa acab acac acad acai acas acba acca accc accd accf acci accs acda acdb acdc acdf acdi acds acfc acfd acfi acfs aci- acia acic acid acif acis acsa acsc acsd acsi acss adaa adab adac adad adai adas adba adbc adbi adcc adci adcs adda addc addd addi adds adfa adfc adfs adia adib adic adif adis adsa adsi adss afaa afad afbs afca afcb afcc afci afcs afdb afdc affa affc affi affs afia afib afid afif afis afsa afsb afsc aiai aias aiba aica aicc aicd aicf aics aida aidb aidc aidi aids aifd aiff aifs aiia aiib aiic aiid aisa aisb aisd aisi asaa asab asac asad asaf asai asas asba asc- asca ascb ascc asci asda asdf asds asfa asfi asia asic asif asii asis assa assc assd assi asss ba-i baaa baad baaf baas baba babb babi babs bac- baca bacc baci bacs bada badb badd badi bads bafc baff baia baib baic baid bais basa basc basf basi bass bbad bbas bbbb bbbs bbci bbdd bbfc bcaa bcas bcbc bcbs bcca bccc bcci bccs bcda bcds bcfc bcia bcis bcsa bcsc bcss bdbc bddc bdii bdsd bfas bfca bfcs bffs bfsi biad biaf bias biba bibb bibi bibs bica bicc bici bics bida bidi bids bifa biff bifi biis bis- bisa bisc bisd biss bsaa bsac bsas bsbd bsci bscs bsfa bsfc bsff bsfs bsic bssc bssd c-cd caaa caab caac caaf caas caba cabf cabi cabs cac- caca cacc caci cada cadc cadd cadi cads cafa cafb cafc caff cafs caia caib caic caid cais casa casb casc casd casi cass cbac cbbc cbbs cbca cbcc cbcs cbdb cbdc cbdi cbds cbfb cbfc cbia cbid cbsa cbsc cbsi ccaa ccab ccac ccad ccaf ccai ccas ccba ccbc ccca cccb cccc cccf ccci cccs ccdc ccdf ccdi ccds ccfa ccfc ccfd ccff ccfi ccic ccid ccii ccis ccsa ccsd ccsf ccsi ccss cdaa cdac cdad cdai cdba cdbf cdcs cdda cddb cdfa cdfs cdic cdii cdis cdss cfaa cfab cfac cfbc cfbs cfca cfcb cfcf cfcs cfda cfds cffb cfia cfsa cfsi ciaa cias ciba cibc cibi cica cicc cici cics cida cidc cidi cids cifa ciff cifs ciia ciid ciii ciis cis- cisa cisc cisd ciss csaa csab csac csas csbf cscb cscc cscd cscf csci cscs csda csdb csfc csia csib csid csis cssa cssd daab daad daas daba dabb dabs daca daci dacs dada dadi dads dafa dafc daff dafi dafs daia daid dais dasa dasb dasc dasd dasi dass dbas dbcc dbcs dbfc dbfs dbsa dbss dcas dcbc dcca dccb dccc dcci dccs dcdb dcds dcfc dcfs dcia dcii dcis dcsc dcss dddd ddss dfaf dfas dfcc dfcs dfds dffa dia- diab diac diad diaf dias diba dibb dibs dica dici dida didi dids dif- difa diff difs diii diis dis- disa disc disd disi diss dsac dsba dsbc dscc dscs dsda dsfa dsfc dsif dssa dssc dssi faaa faac faad faas faba fabd fabi fabs faca facc facs fada fadd fadi fads fafa fafc faff fafi faid fais fasa fasc fasd fasi fass fbis fbsd fcab fcas fcba fcbs fcca fccf fcda fcds fcic fcii fcsc fdca fdic ffcc ffff ffii ffsa ffss fiaa fiac fiad fiaf fias fiba fibs fica ficc fics fida fidc fidf fids fifa fifc fiff fifi fiii fisa fisc fisd fisi fiss fsai fsas fscb fscc fsfi