a-a a-b aaa aab aad aag aan aao aar aas ab- aba abb abd abg abn abo abr abs ad- ada adb add adg adn ado adr ads ag- aga agb agd agg agn ago agr ags an- ana anb and ang ann ano anr ans aoa aob aod aog aon aoo aor aos ar- ara arb ard arg arn aro arr ars as- asa asb asd asg asn aso asr ass baa bab bad bag ban bao bar bas bba bbb bbd bbg bbn bbo bbr bbs bda bdb bdd bdg bdo bdr bds bga bgb bgd bgg bgn bgo bgr bgs bna bnb bnd bng bnn bno bnr bns boa bob bod bog bon boo bor bos bra brb brd brg brn bro brr brs bsa bsb bsd bsg bsn bso bsr bss daa dab dad dag dan dao dar das dba dbb dbd dbg dbn dbo dbr dbs dda ddb ddd ddg ddn ddo ddr dds dga dgd dgg dgn dgr dgs dna dnb dnd dng dnn dno dnr dns doa dob dod dog don doo dor dos dra drb drd drg drn dro drr drs dsa dsb dsd dsg dsn dso dsr dss g-d gaa gab gad gag gan gao gar gas gba gbd gbg gbn gbo gbr gbs gda gdb gdd gdn gdo gdr gds gga ggb ggd ggg ggn ggo ggr ggs gna gnb gnd gnn gno gnr gns goa gob god gog gon goo gor gos gra grb grd grg grn gro grr grs gsa gsb gsd gsg gsn gso gsr gss naa nab nad nag nan nao nar nas nba nbb nbd nbg nbn nbo nbr nbs nda ndb ndd ndg ndn ndo ndr nds nga ngb ngd ngg ngn ngo ngs nna nnb nng nnn nno nns no- noa nob nod nog non noo nor nos nra nrb nrd nrg nrn nro nrr nrs nsa nsb nsd nsg nsn nso nsr nss oaa oab oad oag oan oao oar oas ob- oba obb obd obg obn obo obr obs oda odb odd odg odn odo odr ods oga ogd ogg ogn ogo ogs on- ona onb ond ong onn ono onr ons oo- ooa oob ood oog oon ooo oor oos or- ora orb ord org orn oro orr ors os- osa osb osd osg osn oso osr oss ra- raa rab rad rag ran rao rar ras rba rbb rbd rbg rbn rbo rbr rbs rda rdb rdd rdg rdn rdo rdr rds rga rgb rgd rgg rgn rgo rgr rgs rna rnb rnd rng rnn rno rnr rns roa rob rod rog ron roo ror ros rra rrb rrd rrg rrn rrr rrs rsa rsb rsd rsg rsn rso rsr rss saa sab sad sag san sao sar sas sba sbb sbd sbg sbn sbo sbr sbs sda sdb sdd sdg sdn sdo sdr sds sga sgb sgd sgg sgn sgo sgr sgs sna snb snd sng snn sno snr sns soa sob sod sog son soo sor sos sr- sra srb srd srg srn sro srr srs ss- ssa ssb ssd ssg ssn sso ssr sss