a-a a-b aaa aab aad aam aan aao aar aas ab- aba abb abd abm abn abo abr abs ad- ada adb add adm adn ado adr ads ama amb amd amm amn amo amr ams an- ana anb and anm ann ano anr ans aoa aob aod aom aon aoo aor aos ar- ara arb ard arm arn aro arr ars as- asa asb asd asm asn aso asr ass baa bab bad bam ban bao bar bas bba bbb bbd bbm bbn bbo bbr bbs bda bdb bdd bdm bdo bdr bds bma bmb bmd bmm bmn bmo bmr bms bna bnb bnd bnn bno bnr bns boa bob bod bom bon boo bor bos bra brb brd brm brn bro brr brs bsa bsb bsd bsm bsn bso bsr bss daa dab dad dam dan dao dar das dba dbb dbd dbm dbn dbo dbr dbs dda ddb ddd ddm ddn ddo ddr dds dma dmb dmd dmm dmn dmo dmr dms dna dnb dnd dnm dnn dno dnr dns doa dob dod dom don doo dor dos dra drb drd drm drn dro drr drs dsa dsb dsd dsm dsn dso dsr dss m-o m-r maa mab mad mam man mao mar mas mba mbb mbd mbm mbo mbr mbs mda mdb mdd mdm mdn mdo mdr mds mma mmb mmd mmm mmn mmo mmr mms mna mnb mnm mnn mno mnr mns moa mob mod mom mon moo mor mos mra mrb mrd mrm mrn mro mrr mrs msa msb msd msm msn mso msr mss naa nab nad nam nan nao nar nas nba nbb nbd nbm nbn nbo nbr nbs nda ndb ndd ndm ndn ndo ndr nds nma nmb nmd nmm nmn nmo nmr nms nna nnb nnm nnn nno nns no- noa nob nod nom non noo nor nos nra nrb nrd nrm nrn nro nrr nrs nsa nsb nsd nsm nsn nso nsr nss oaa oab oad oam oan oao oar oas ob- oba obb obd obm obn obo obr obs oda odb odd odm odn odo odr ods om- oma omb omd omm omn omo omr oms on- ona onb ond onn ono onr ons oo- ooa oob ood oom oon ooo oor oos or- ora orb ord orm orn oro orr ors os- osa osb osd osm osn oso osr oss ra- raa rab rad ram ran rao rar ras rba rbb rbd rbm rbn rbo rbr rbs rda rdb rdd rdm rdn rdo rdr rds rma rmb rmd rmm rmn rmo rmr rms rna rnb rnd rnm rnn rno rnr rns roa rob rod rom ron roo ror ros rra rrb rrd rrm rrn rrr rrs rsa rsb rsd rsm rsn rso rsr rss saa sab sad sam san sao sar sas sba sbb sbd sbm sbn sbo sbr sbs sda sdb sdd sdm sdn sdo sdr sds sma smb smd smm smn smo smr sms sna snb snd snm snn sno snr sns soa sob sod som son soo sor sos sr- sra srb srd srm srn sro srr srs ss- ssa ssb ssd ssm ssn sso ssr sss