a-a a-b a-i aaa aab aad aaf aai aam aao aar aas ab- aba abb abd abf abi abm abo abr abs ad- ada adb add adf adi adm ado adr ads af- afa afb afd aff afi afm afo afr afs ai- aia aib aid aif aii aim aio air ais ama amb amd amf ami amm amo amr ams aoa aob aod aof aoi aom aoo aor aos ar- ara arb ard arf ari arm aro arr ars as- asa asb asd asf asi asm aso asr ass baa bab bad baf bai bam bao bar bas bba bbb bbd bbf bbi bbm bbo bbr bbs bda bdb bdd bdf bdi bdm bdo bdr bds bfa bfb bfd bff bfi bfm bfo bfr bfs bi- bia bib bid bif bii bim bio bir bis bma bmb bmd bmf bmi bmm bmo bmr bms boa bob bod bof boi bom boo bor bos bra brb brd brf bri brm bro brr brs bsa bsb bsd bsf bsi bsm bso bsr bss daa dab dad daf dai dam dao dar das dba dbb dbd dbf dbi dbm dbo dbr dbs dda ddb ddd ddf ddi ddm ddo ddr dds dfa dfb dfd dff dfi dfm dfo dfr dfs di- dia dib did dif dii dim dio dir dis dma dmb dmd dmf dmi dmm dmo dmr dms doa dob dod dof doi dom doo dor dos dra drb drd dri drm dro drr drs dsa dsb dsd dsf dsi dsm dso dsr dss faa fab fad faf fai fam fao far fas fba fbb fbd fbf fbi fbm fbo fbr fbs fda fdb fdd fdf fdi fdm fdo fdr fds ffa ffd fff ffi ffm ffo ffr ffs fia fib fid fif fii fim fir fis fma fmb fmd fmf fmi fmm fmo fmr fms foa fob fof foi fom foo for fos fra frb frd frf fri frm fro frr frs fsa fsb fsd fsf fsi fsm fso fsr fss i-d i-f ia- iaa iab iad iaf iai iam iao iar ias iba ibb ibd ibf ibi ibm ibo ibr ibs ida idb idd idf idi idm ido idr ids ifa ifb ifd iff ifi ifm ifo ifr ifs iia iib iid iif iii iim iio iir iis im- ima imb imd imf imi imm imo ims io- ioa iob iod iof ioi iom ioo ior ios ir- ira irb ird irf iri irm iro irr irs is- isa isb isd isf isi ism iso isr iss m-f m-o m-r maa mab mad maf mai mam mao mar mas mba mbb mbd mbf mbi mbm mbo mbr mbs mda mdb mdd mdf mdi mdm mdo mdr mds mfa mfb mfd mff mfi mfm mfo mfr mfs mi- mia mib mid mif mii mim mio mir mis mma mmb mmd mmf mmi mmm mmo mmr mms moa mob mod mof moi mom moo mor mos mra mrb mrd mrf mri mrm mro mrr mrs msa msb msd msf msi msm mso msr mss o-i oaa oab oad oaf oai oam oao oar oas ob- oba obb obd obf obi obm obo obr obs oda odb odd odf odi odm odo odr ods of- ofa ofb ofd off ofi ofm ofo ofr ofs oia oib oid oif oii oim oio oir ois om- oma omb omd omf omi omm omo omr oms oo- ooa oob ood oof ooi oom ooo oor oos or- ora orb ord orf ori orm oro orr ors os- osa osb osd osf osi osm oso osr oss ra- raa rab rad raf rai ram rao rar ras rba rbb rbd rbf rbi rbm rbo rbr rbs rda rdb rdd rdf rdi rdm rdo rdr rds rfa rfb rfd rff rfi rfm rfo rfr rfs ria rib rid rif rii rim rio rir ris rma rmb rmd rmf rmi rmm rmo rmr rms roa rob rod rof roi rom roo ror ros rra rrb rrd rrf rri rrm rrr rrs rsa rsb rsd rsf rsi rsm rso rsr rss saa sab sad saf sai sam sao sar sas sba sbb sbd sbf sbi sbm sbo sbr sbs sda sdb sdd sdf sdi sdm sdo sdr sds sfa sfb sfd sff sfi sfm sfo sfr sfs sia sib sid sif sii sim sio sir sis sma smb smd smf smi smm smo smr sms soa sob sod sof soi som soo sor sos sr- sra srb srd srf sri srm sro srr srs ss- ssa ssb ssd ssf ssi ssm sso ssr sss