-ic a-a a-b a-c a-i aaa aab aac aad aai aar aas ab- aba abb abc abd abi abr abs ac- aca acb acc acd aci acr acs ad- ada adb adc add adi adr ads ai- aia aib aic aid aii air ais ar- ara arb arc ard ari arr ars as- asa asb asc asd asi asr ass baa bab bac bad bai bar bas bba bbb bbc bbd bbi bbr bbs bca bcb bcc bcd bci bcr bcs bda bdb bdc bdd bdi bdr bds bi- bia bib bic bid bii bir bis bra brb brd bri brr brs bsa bsb bsc bsd bsi bsr bss c-- caa cab cac cad cai car cas cba cbb cbc cbd cbi cbr cbs cca ccb ccc ccd cci ccr ccs cda cdb cdc cdd cdi cdr cds ci- cia cib cic cid cii cir cis cra crb crc crd cri crr crs csa csb csc csd csi csr css daa dab dac dad dai dar das dba dbb dbc dbd dbi dbr dbs dca dcb dcc dcd dci dcr dcs dda ddb ddc ddd ddi ddr dds di- dia dib dic did dii dir dis dra drb drc drd dri drr drs dsa dsb dsc dsd dsi dsr dss i-d ia- iaa iab iac iad iai iar ias iba ibb ibc ibd ibi ibr ibs ica icb icc icd ici icr ics ida idb idc idd idi idr ids iia iib iic iid iii iir iis ir- ira irb irc ird iri irr irs is- isa isb isc isd isi isr iss ra- raa rab rac rad rai rar ras rba rbb rbc rbd rbi rbr rbs rca rcb rcc rcd rci rcr rcs rda rdb rdc rdd rdi rdr rds ria rib ric rid rii rir ris rra rrb rrc rrd rri rrr rrs rsa rsb rsc rsd rsi rsr rss saa sab sac sad sai sar sas sba sbb sbc sbd sbi sbr sbs sca scb scc scd sci scr scs sda sdb sdc sdd sdi sdr sds sia sib sic sid sii sir sis sr- sra srb src srd sri srr srs ss- ssa ssb ssc ssd ssi ssr sss

a-ii aaaa aaab aaac aaad aaai aaar aaas aaba aabb aabc aabd aabi aaca aacb aacc aacd aaci aacr aacs aada aadc aadi aads aaib aaic aaii aais aara aarc aard aari aars aasa aasc aasd aasi aass abaa abab abac abad abai abar abas abb- abba abbb abbi abbr abbs abca abcb abcc abcd abci abcr abcs abda abdi abia abib abic abid abir abis abra abrc abri abrs abs- absa absd absi abss acaa acab acac acad acai acar acas acba acca accc accd acci accs acda acdb acdc acdi acds aci- acia acic acid acir acis acr- acra acrc acri acrr acrs acsa acsc acsd acsi acss adaa adab adac adad adai adar adas adba adbc adbi adcc adci adcs adda addc addd addi addr adds adia adib adic adir adis adra adrs adsa adsi adsr adss aiai aias aiba aica aicc aicd aicr aics aida aidb aidc aidi aidr aids aiia aiib aiic aiid aiir aira aird airi airs aisa aisb aisd aisi aisr arab arac arad arai arar aras arba arbi arbs arc- arca arci arcs arda ardc ardi ards aria arib arid arii aris arr- arra arrc arri arrr arrs ars- arsa arsc arsd arsi asaa asab asac asad asai asar asas asba asc- asca ascb ascc asci ascr asda asds asia asic asii asir asis asra asrc asrs assa assc assd assi assr asss ba-i baaa baad baar baas baba babb babi babr babs bac- baca bacc baci bacs bada badb badd badi badr bads baia baib baic baid bair bais bar- bara barb barc bard bari barr bars basa basc basi bass bbad bbas bbbb bbbs bbci bbdd bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcda bcds bcia bcis bcra bcrs bcsa bcsc bcss bd-r bdbc bddc bdii bdsd biad biar bias biba bibb bibi bibs bica bicc bici bics bida bidi bidr bids biis bira birb bird biri birr birs bis- bisa bisc bisd biss brab brac brad brai bras brca brcb brda brds bria bric brid bris brrr brrs brsb brsr bsaa bsac bsas bsbd bsci bscs bsic bsra bsrd bssc bssd c-cd caaa caab caac caas caba cabi cabs cac- caca cacc caci cacr cada cadc cadd cadi cadr cads caia caib caic caid cair cais cara carb carc card cari carr cars casa casb casc casd casi casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbdb cbdc cbdi cbds cbia cbid cbir cbrd cbsa cbsc cbsi ccaa ccab ccac ccad ccai ccar ccas ccba ccbc ccca cccb cccc ccci cccs ccdc ccdi ccdr ccds ccic ccid ccii ccir ccis ccra ccrc ccri ccrs ccsa ccsd ccsi ccss cd-r cdaa cdac cdad cdai cdba cdcs cdda cddb cddr cdic cdii cdis cdrs cdss ciaa ciar cias ciba cibc cibi cica cicc cici cicr cics cida cidc cidi cidr cids ciia ciid ciii ciis cira cirb circ ciri cirr cirs cis- cisa cisc cisd cisr ciss crab crac crai crar cras crbc crca crcc crcr crda crdc cria crib cric cris crsa crss csaa csab csac csar csas cscb cscc cscd csci cscr cscs csda csdb csdr csia csib csid csir csis csra csrc csrd csrs cssa cssd cssr daab daad daar daas daba dabb dabs daca daci dacs dada dadi dads daia daid dair dais dara darb darc dard dari darr dars dasa dasb dasc dasd dasi dass dbar dbas dbcc dbcs dbrs dbsa dbss dcas dcbc dcca dccb dccc dcci dccs dcdb dcds dcia dcii dcis dcra dcsc dcss dddd ddrc ddss dia- diab diac diad diar dias diba dibb dibs dica dici dida didi dids diii diis dira dird dirr dirs dis- disa disc disd disi diss draa drab drac drad drar dras drba drbc drca drda drib dric drra drrs drsa dsac dsba dsbc dscc dscr dscs