a-a a-b aaa aab aag aam aan aao aar aas ab- aba abb abg abm abn abo abr abs ag- aga agb agg agm agn ago agr ags ama amb amg amm amn amo amr ams an- ana anb ang anm ann ano anr ans aoa aob aog aom aon aoo aor aos ar- ara arb arg arm arn aro arr ars as- asa asb asg asm asn aso asr ass baa bab bag bam ban bao bar bas bba bbb bbg bbm bbn bbo bbr bbs bga bgb bgg bgm bgn bgo bgr bgs bma bmb bmg bmm bmn bmo bmr bms bna bnb bng bnn bno bnr bns boa bob bog bom bon boo bor bos bra brb brg brm brn bro brr brs bsa bsb bsg bsm bsn bso bsr bss gaa gab gag gam gan gao gar gas gba gbg gbm gbn gbo gbr gbs gga ggb ggg ggm ggn ggo ggr ggs gma gmb gmg gmm gmn gmo gmr gms gna gnb gnm gnn gno gnr gns goa gob gog gom gon goo gor gos gra grb grg grm grn gro grr grs gsa gsb gsg gsm gsn gso gsr gss m-o m-r maa mab mag mam man mao mar mas mba mbb mbg mbm mbo mbr mbs mga mgb mgm mgn mgo mgr mgs mma mmb mmg mmm mmn mmo mmr mms mna mnb mng mnm mnn mno mnr mns moa mob mog mom mon moo mor mos mra mrb mrg mrm mrn mro mrr mrs msa msb msg msm msn mso msr mss naa nab nag nam nan nao nar nas nba nbb nbg nbm nbn nbo nbr nbs nga ngb ngg ngm ngn ngo ngs nma nmb nmg nmm nmn nmo nmr nms nna nnb nng nnm nnn nno nns no- noa nob nog nom non noo nor nos nra nrb nrg nrm nrn nro nrr nrs nsa nsb nsg nsm nsn nso nsr nss oaa oab oag oam oan oao oar oas ob- oba obb obg obm obn obo obr obs oga ogg ogn ogo ogs om- oma omb omg omm omn omo omr oms on- ona onb ong onn ono onr ons oo- ooa oob oog oom oon ooo oor oos or- ora orb org orm orn oro orr ors os- osa osb osg osm osn oso osr oss ra- raa rab rag ram ran rao rar ras rba rbb rbg rbm rbn rbo rbr rbs rga rgb rgg rgn rgo rgr rgs rma rmb rmg rmm rmn rmo rmr rms rna rnb rng rnm rnn rno rnr rns roa rob rog rom ron roo ror ros rra rrb rrg rrm rrn rrr rrs rsa rsb rsg rsm rsn rso rsr rss saa sab sag sam san sao sar sas sba sbb sbg sbm sbn sbo sbr sbs sga sgb sgg sgm sgn sgo sgr sgs sma smb smg smm smn smo smr sms sna snb sng snm snn sno snr sns soa sob sog som son soo sor sos sr- sra srb srg srm srn sro srr srs ss- ssa ssb ssg ssm ssn sso ssr sss