a-a a-b aaa aab aad aaf aam aao aar aas ab- aba abb abd abf abm abo abr abs ad- ada adb add adf adm ado adr ads af- afa afb afd aff afm afo afr afs ama amb amd amf amm amo amr ams aoa aob aod aof aom aoo aor aos ar- ara arb ard arf arm aro arr ars as- asa asb asd asf asm aso asr ass baa bab bad baf bam bao bar bas bba bbb bbd bbf bbm bbo bbr bbs bda bdb bdd bdf bdm bdo bdr bds bfa bfb bfd bff bfm bfo bfr bfs bma bmb bmd bmf bmm bmo bmr bms boa bob bod bof bom boo bor bos bra brb brd brf brm bro brr brs bsa bsb bsd bsf bsm bso bsr bss daa dab dad daf dam dao dar das dba dbb dbd dbf dbm dbo dbr dbs dda ddb ddd ddf ddm ddo ddr dds dfa dfb dfd dff dfm dfo dfr dfs dma dmb dmd dmf dmm dmo dmr dms doa dob dod dof dom doo dor dos dra drb drd drm dro drr drs dsa dsb dsd dsf dsm dso dsr dss faa fab fad faf fam fao far fas fba fbb fbd fbf fbm fbo fbr fbs fda fdb fdd fdf fdm fdo fdr fds ffa ffd fff ffm ffo ffr ffs fma fmb fmd fmf fmm fmo fmr fms foa fob fof fom foo for fos fra frb frd frf frm fro frr frs fsa fsb fsd fsf fsm fso fsr fss m-f m-o m-r maa mab mad maf mam mao mar mas mba mbb mbd mbf mbm mbo mbr mbs mda mdb mdd mdf mdm mdo mdr mds mfa mfb mfd mff mfm mfo mfr mfs mma mmb mmd mmf mmm mmo mmr mms moa mob mod mof mom moo mor mos mra mrb mrd mrf mrm mro mrr mrs msa msb msd msf msm mso msr mss oaa oab oad oaf oam oao oar oas ob- oba obb obd obf obm obo obr obs oda odb odd odf odm odo odr ods of- ofa ofb ofd off ofm ofo ofr ofs om- oma omb omd omf omm omo omr oms oo- ooa oob ood oof oom ooo oor oos or- ora orb ord orf orm oro orr ors os- osa osb osd osf osm oso osr oss ra- raa rab rad raf ram rao rar ras rba rbb rbd rbf rbm rbo rbr rbs rda rdb rdd rdf rdm rdo rdr rds rfa rfb rfd rff rfm rfo rfr rfs rma rmb rmd rmf rmm rmo rmr rms roa rob rod rof rom roo ror ros rra rrb rrd rrf rrm rrr rrs rsa rsb rsd rsf rsm rso rsr rss saa sab sad saf sam sao sar sas sba sbb sbd sbf sbm sbo sbr sbs sda sdb sdd sdf sdm sdo sdr sds sfa sfb sfd sff sfm sfo sfr sfs sma smb smd smf smm smo smr sms soa sob sod sof som soo sor sos sr- sra srb srd srf srm sro srr srs ss- ssa ssb ssd ssf ssm sso ssr sss

a-do aaaa aaab aaad aaaf aaam aaar aaas aaba aabb aabd aabm aada aads aafa aafb aafd aaff aama aamb aamd aamo aamr aams aaoo aara aard aarm aaro aars aasa aasd aasf aasm aass abaa abab abad abaf abam abar abas abb- abba abbb abbo abbr abbs abda abdo abff abma abmb abms aboa abob abod abof aboo abor abos abra abro abrs abs- absa absd absf abss adaa adab adad adam adao adar adas adba adda addd addo addr adds adfa adfs adma admb admr adms adob adod adoo ador ados adra adro adrs adsa adsm adso adsr adss afaa afad afam afao afar afbs afdb affa affo affs afma afoa afoo afor afr- afra afrm afro afrs afsa afsb afsm amaa amad amam amar amas amb- amba ambo ambr ambs amda amdo amds amfm amfr amm- amma ammo amob amod amof amoo amor amos amra amro amsa amsd amso amss aoba aoma aora aorb aors aosd aoss arab arad araf aram arar aras arba arbs arda ardf ardm ardo ards arfa arfb arff arfs arma armd armm armo arms aroa arob arod arom aroo aror aros arr- arra arro arrr arrs ars- arsa arsd arso asaa asab asad asaf asam asao asar asas asba asbm asbo asda asdf asdo asds asfa asma asmd asmf asmm asmr asms asob asod asof asom asor asos asra asrm asro asrs assa assd asso assr asss baaa baad baaf baam baar baas baba babb babm babo babr babs bada badb badd bado badr bads baff bafo bama bamb bamf bamm bams baos bar- bara barb bard barf barm baro barr bars basa basf baso bass bbad bbas bbbb bbbs bbdd bbdo bd-r bdos bdrm bdsd bdsm bfas bffs bfsr bmaa bmdb boab boad boar boas boba bobb bobo bobs boda bodb bodo bods bofa bofd boff bofs boma bomb boms boob bood boof boom boor boos bor- bora bord borf borm boro borr bors bosa bosm boso boss brab brad braf bram brao bras brda brdm brdo brds brfm broa brob brod brom broo bror bros brrm brrr brrs brsb brsr bsaa bsam bsas bsbd bsfa bsff bsfs bsms bsod bsos bsra bsrd bsrm bssd bssm d-bo daab daad daam daar daas daba dabb dabo dabs dada dado dads dafa daff dafo dafs dama damb damm damo dams daos dara darb dard darf daro darr dars dasa dasb dasd dass dbar dbas dbfo dbfs dbms dbos dbrs dbsa dbss dddd ddss dfaf dfas dfds dffa dfma dfrf dfsm dmaa dmab dmas dmba dmbf dmds dmfa dmrb dmsa dmso dmss doab doar doas doba dobb dobs dod- doda dodd dodo dods doff doma domb domm domo doms doob dood doof doom door doos dora dord dorf dorm doro dorr dors dosa doso doss draa drab drad draf dram drar dras drba drda drms drob drod