-ic a-a a-b a-c a-i aaa aab aac aaf aai aao aar aas ab- aba abb abc abf abi abo abr abs ac- aca acb acc acf aci aco acr acs af- afa afb afc aff afi afo afr afs ai- aia aib aic aif aii aio air ais aoa aob aoc aof aoi aoo aor aos ar- ara arb arc arf ari aro arr ars as- asa asb asc asf asi aso asr ass baa bab bac baf bai bao bar bas bba bbb bbc bbf bbi bbo bbr bbs bca bcb bcc bcf bci bco bcr bcs bfa bfb bfc bff bfi bfo bfr bfs bi- bia bib bic bif bii bio bir bis boa bob boc bof boi boo bor bos bra brb brf bri bro brr brs bsa bsb bsc bsf bsi bso bsr bss c-- caa cab cac caf cai cao car cas cba cbb cbc cbf cbi cbo cbr cbs cca ccb ccc ccf cci cco ccr ccs cfa cfb cfc cff cfi cfo cfr cfs ci- cia cib cic cif cii cio cir cis co- coa cob coc cof coi coo cor cos cra crb crc crf cri cro crr crs csa csb csc csf csi cso csr css faa fab fac faf fai fao far fas fba fbb fbc fbf fbi fbo fbr fbs fca fcb fcc fcf fci fco fcr fcs ffa ffc fff ffi ffo ffr ffs fia fib fic fif fii fir fis foa fob foc fof foi foo for fos fra frb frc frf fri fro frr frs fsa fsb fsc fsf fsi fso fsr fss i-f ia- iaa iab iac iaf iai iao iar ias iba ibb ibc ibf ibi ibo ibr ibs ica icb icc icf ici ico icr ics ifa ifb ifc iff ifi ifo ifr ifs iia iib iic iif iii iio iir iis io- ioa iob ioc iof ioi ioo ior ios ir- ira irb irc irf iri iro irr irs is- isa isb isc isf isi iso isr iss o-i oaa oab oac oaf oai oao oar oas ob- oba obb obc obf obi obo obr obs oc- oca ocb occ ocf oci oco ocr ocs of- ofa ofb ofc off ofi ofo ofr ofs oia oib oic oif oii oio oir ois oo- ooa oob ooc oof ooi ooo oor oos or- ora orb orc orf ori oro orr ors os- osa osb osc osf osi oso osr oss ra- raa rab rac raf rai rao rar ras rba rbb rbc rbf rbi rbo rbr rbs rca rcb rcc rcf rci rco rcr rcs rfa rfb rfc rff rfi rfo rfr rfs ria rib ric rif rii rio rir ris roa rob roc rof roi roo ror ros rra rrb rrc rrf rri rrr rrs rsa rsb rsc rsf rsi rso rsr rss saa sab sac saf sai sao sar sas sba sbb sbc sbf sbi sbo sbr sbs sca scb scc scf sci sco scr scs sfa sfb sfc sff sfi sfo sfr sfs sia sib sic sif sii sio sir sis soa sob soc sof soi soo sor sos sr- sra srb src srf sri sro srr srs ss- ssa ssb ssc ssf ssi sso ssr sss

a-ii aaaa aaab aaac aaaf aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aacf aaci aaco aacr aacs aafa aafb aafc aaff aafi aaib aaic aaii aais aaoo aara aarc aari aaro aars aasa aasc aasf aasi aass abaa abab abac abaf abai abar abas abb- abba abbb abbi abbo abbr abbs abca abcb abcc abcf abci abcr abcs abff abia abib abic abir abis aboa abob abof aboo abor abos abra abrc abri abro abrs abs- absa absf absi abss acaa acab acac acai acar acas acba acca accc accf acci acco accs acfc acfi acfs aci- acia acic acif acir acis acoa acor acos acr- acra acrc acri acro acrr acrs acsa acsc acsi acss afaa afao afar afbs afca afcb afcc afci afcs affa affc affi affo affs afia afib afif afir afis afoa afoo afor afr- afra afrc afri afro afrs afsa afsb afsc aiai aias aiba aibo aica aicc aicf aicr aics aiff aifs aiia aiib aiic aiir aioc aioi aira airi airo airs aisa aisb aisi aiso aisr aoba aoca aocs aora aorb aors aoss arab arac araf arai arar aras arba arbi arbs arc- arca arci arco arcs arfa arfb arfc arff arfs aria arib arif arii ario aris aroa arob aroi aroo aror aros arr- arra arrc arri arro arrr arrs ars- arsa arsc arsi arso asaa asab asac asaf asai asao asar asas asba asbo asc- asca ascb ascc asci asco ascr asfa asfi asia asic asif asii asio asir asis asob asoc asof asoi asor asos asra asrc asro asrs assa assc assi asso assr asss ba-i baaa baaf baar baas baba babb babi babo babr babs bac- baca bacc baci baco bacs bafc baff bafo baia baib baic baio bair bais baos bar- bara barb barc barf bari baro barr bars basa basc basf basi baso bass bbas bbbb bbbs bbci bbfc bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcfc bcia bcis bcof bcor bcos bcra bcrs bcsa bcsc bcss bfas bfca bfcs bffs bfsi bfsr biaf biao biar bias biba bibb bibi bibo bibs bica bicc bici bico bics bifa biff bifi biis bio- bioc bioi bios bira birb biri biro birr birs bis- bisa bisc biso biss boab boac boai boar boas boba bobb bobi bobo bobs boca boco bocs bofa boff bofs boi- boii bois boob booc boof boor boos bor- bora borf bori boro borr bors bosa bosc bosi boso boss brab brac braf brai brao bras brca brcb brfc bria bric brio bris broa brob broc broo bror bros brrr brrs brsb brsr bsaa bsac bsas bsci bscs bsfa bsfc bsff bsfs bsic bsos bsra bssc c-bo caaa caab caac caaf caas caba cabf cabi cabo cabs cac- caca cacc caci