-ic a-a a-b a-c a-i aaa aab aac aaf aai aar aas ab- aba abb abc abf abi abr abs ac- aca acb acc acf aci acr acs af- afa afb afc aff afi afr afs ai- aia aib aic aif aii air ais ar- ara arb arc arf ari arr ars as- asa asb asc asf asi asr ass baa bab bac baf bai bar bas bba bbb bbc bbf bbi bbr bbs bca bcb bcc bcf bci bcr bcs bfa bfb bfc bff bfi bfr bfs bi- bia bib bic bif bii bir bis bra brb brf bri brr brs bsa bsb bsc bsf bsi bsr bss c-- caa cab cac caf cai car cas cba cbb cbc cbf cbi cbr cbs cca ccb ccc ccf cci ccr ccs cfa cfb cfc cff cfi cfr cfs ci- cia cib cic cif cii cir cis cra crb crc crf cri crr crs csa csb csc csf csi csr css faa fab fac faf fai far fas fba fbb fbc fbf fbi fbr fbs fca fcb fcc fcf fci fcr fcs ffa ffc fff ffi ffr ffs fia fib fic fif fii fir fis fra frb frc frf fri frr frs fsa fsb fsc fsf fsi fsr fss i-f ia- iaa iab iac iaf iai iar ias iba ibb ibc ibf ibi ibr ibs ica icb icc icf ici icr ics ifa ifb ifc iff ifi ifr ifs iia iib iic iif iii iir iis ir- ira irb irc irf iri irr irs is- isa isb isc isf isi isr iss ra- raa rab rac raf rai rar ras rba rbb rbc rbf rbi rbr rbs rca rcb rcc rcf rci rcr rcs rfa rfb rfc rff rfi rfr rfs ria rib ric rif rii rir ris rra rrb rrc rrf rri rrr rrs rsa rsb rsc rsf rsi rsr rss saa sab sac saf sai sar sas sba sbb sbc sbf sbi sbr sbs sca scb scc scf sci scr scs sfa sfb sfc sff sfi sfr sfs sia sib sic sif sii sir sis sr- sra srb src srf sri srr srs ss- ssa ssb ssc ssf ssi ssr sss

a-ii aaaa aaab aaac aaaf aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aacf aaci aacr aacs aafa aafb aafc aaff aafi aaib aaic aaii aais aara aarc aari aars aasa aasc aasf aasi aass abaa abab abac abaf abai abar abas abb- abba abbb abbi abbr abbs abca abcb abcc abcf abci abcr abcs abff abia abib abic abir abis abra abrc abri abrs abs- absa absf absi abss acaa acab acac acai acar acas acba acca accc accf acci accs acfc acfi acfs aci- acia acic acif acir acis acr- acra acrc acri acrr acrs acsa acsc acsi acss afaa afar afbs afca afcb afcc afci afcs affa affc affi affs afia afib afif afir afis afr- afra afrc afri afrs afsa afsb afsc aiai aias aiba aica aicc aicf aicr aics aiff aifs aiia aiib aiic aiir aira airi airs aisa aisb aisi aisr arab arac araf arai arar aras arba arbi arbs arc- arca arci arcs arfa arfb arfc arff arfs aria arib arif arii aris arr- arra arrc arri arrr arrs ars- arsa arsc arsi asaa asab asac asaf asai asar asas asba asc- asca ascb ascc asci ascr asfa asfi asia asic asif asii asir asis asra asrc asrs assa assc assi assr asss ba-i baaa baaf baar baas baba babb babi babr babs bac- baca bacc baci bacs bafc baff baia baib baic bair bais bar- bara barb barc barf bari barr bars basa basc basf basi bass bbas bbbb bbbs bbci bbfc bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcfc bcia bcis bcra bcrs bcsa bcsc bcss bfas bfca bfcs bffs bfsi bfsr biaf biar bias biba bibb bibi bibs bica bicc bici bics bifa biff bifi biis bira birb biri birr birs bis- bisa bisc biss brab brac braf brai bras brca brcb brfc bria bric bris brrr brrs brsb brsr bsaa bsac bsas bsci bscs bsfa bsfc bsff bsfs bsic bsra bssc caaa caab caac caaf caas caba cabf cabi cabs cac- caca cacc caci cacr cafa cafb cafc caff cafs caia caib caic cair cais cara carb carc carf cari carr cars casa casb casc casi casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbfb cbfc cbia cbir cbsa cbsc cbsi ccaa ccab ccac ccaf ccai ccar ccas ccba ccbc ccca cccb cccc cccf ccci cccs ccfa ccfc ccff ccfi ccic ccii ccir ccis ccra ccrc ccrf ccri ccrs ccsa ccsf ccsi ccss cfaa cfab cfac cfar cfbc cfbr cfbs cfca cfcb cfcf cfcs cffb cffr cfia cfra cfrb cfsa cfsi ciaa ciar cias ciba cibc cibi cica cicc cici cicr cics cifa ciff cifs ciia ciii ciis cira cirb circ ciri cirr cirs cis- cisa cisc cisr ciss crab crac craf crai crar cras crbc crca crcc crcr crfc crfs cria crib cric crif cris crsa crss csaa csab csac csar csas csbf cscb cscc cscf csci cscr cscs csfc csfr csia csib csir csis csra csrc csrs cssa cssr faaa faac faas faba fabi fabs faca facc facs fafa fafc faff fafi fair fais fara farb farc farr fars fasa fasc fasi fass fbar fbis fbrs fcab fcar fcas fcba fcbs fcca fccf fcic fcii fcra fcsc ffar ffcc ffff ffii ffrr ffsa ffss fiaa fiac fiaf fiar fias fiba fibs fica ficc fics fifa fifc fiff fifi fiii fira firs fisa fisc fisi fiss frab frac fras frbc frcc frfc fria frib fric fris frsb frsc fsai fsas fscb fscc fsfi fsia fsra fssa fssc fssf iaaa iaac iaai iaas iaba iaca iacc iacr iacs iafc iaff iaia iais iara iarc iars iasa iasc iasi iasr ibac ibar ibas ibca ibcs ibfi ibia ibis ibra ibrc ibri ibsa ibsf ibss icaa icab icac icaf icai icar icas icbc icbs icca iccb iccc iccf icci iccr iccs icfb