a-a a-b aaa aab aad aag aan aao aap aar aas ab- aba abb abd abg abn abo abp abr abs ad- ada adb add adg adn ado adp adr ads ag- aga agb agd agg agn ago agp agr ags an- ana anb and ang ann ano anp anr ans aoa aob aod aog aon aoo aop aor aos ap- apa apb apd apg apn apo app apr aps ar- ara arb ard arg arn aro arp arr ars as- asa asb asd asg asn aso asp asr ass b-p baa bab bad bag ban bao bap bar bas bba bbb bbd bbg bbn bbo bbp bbr bbs bda bdb bdd bdg bdo bdp bdr bds bga bgb bgd bgg bgn bgo bgp bgr bgs bna bnb bnd bng bnn bno bnp bnr bns boa bob bod bog bon boo bop bor bos bpa bpb bpd bpg bpn bpo bpp bpr bps bra brb brd brg brn bro brp brr brs bsa bsb bsd bsg bsn bso bsp bsr bss daa dab dad dag dan dao dap dar das dba dbb dbd dbg dbn dbo dbp dbr dbs dda ddb ddd ddg ddn ddo ddp ddr dds dga dgd dgg dgn dgp dgr dgs dna dnb dnd dng dnn dno dnp dnr dns doa dob dod dog don doo dop dor dos dpa dpb dpd dpg dpn dpo dpp dpr dps dra drb drd drg drn dro drp drr drs dsa dsb dsd dsg dsn dso dsp dsr dss g-d g-p gaa gab gad gag gan gao gap gar gas gba gbd gbg gbn gbo gbp gbr gbs gda gdb gdd gdn gdo gdp gdr gds gga ggb ggd ggg ggn ggo ggp ggr ggs gna gnb gnd gnn gno gnp gnr gns goa gob god gog gon goo gop gor gos gpa gpb gpd gpg gpn gpo gpp gpr gps gra grb grd grg grn gro grp grr grs gsa gsb gsd gsg gsn gso gsp gsr gss naa nab nad nag nan nao nap nar nas nba nbb nbd nbg nbn nbo nbp nbr nbs nda ndb ndd ndg ndn ndo ndp ndr nds nga ngb ngd ngg ngn ngo ngp ngs nna nnb nng nnn nno nnp nns no- noa nob nod nog non noo nop nor nos npa npb npd npg npn npo npp npr nps nra nrb nrd nrg nrn nro nrp nrr nrs nsa nsb nsd nsg nsn nso nsp nsr nss oaa oab oad oag oan oao oap oar oas ob- oba obb obd obg obn obo obp obr obs oda odb odd odg odn odo odp odr ods oga ogd ogg ogn ogo ogp ogs on- ona onb ond ong onn ono onp onr ons oo- ooa oob ood oog oon ooo oop oor oos op- opa opb opd opg opn opo opp opr ops or- ora orb ord org orn oro orp orr ors os- osa osb osd osg osn oso osp osr oss p-p paa pab pad pag pan pao pap par pas pba pbb pbd pbg pbn pbo pbp pbr pbs pda pdb pdd pdg pdn pdo pdp pdr pds pga pgb pgd pgg pgn pgo pgp pgr pgs pn- pna pnb pnd png pnn pno pnp pnr pns poa pob pod pog pon poo pop por pos ppa ppb ppd ppg ppn ppo ppp ppr pps pra prb prd prg prn pro prp prr prs ps- psa psb psd psg psn pso psp psr pss ra- raa rab rad rag ran rao rap rar ras rba rbb rbd rbg rbn rbo rbp rbr rbs rda rdb rdd rdg rdn rdo rdp rdr rds rga rgb rgd rgg rgn rgo rgp rgr rgs rna rnb rnd rng rnn rno rnp rnr rns roa rob rod rog ron roo rop ror ros rpa rpb rpd rpg rpn rpo rpp rpr rps rra rrb rrd rrg rrn rrp rrr rrs rsa rsb rsd rsg rsn rso rsp rsr rss saa sab sad sag san sao sap sar sas sba sbb sbd sbg sbn sbo sbp sbr sbs sda sdb sdd sdg sdn sdo sdp sdr sds sga sgb sgd sgg sgn sgo sgp sgr sgs sna snb snd sng snn sno snp snr sns soa sob sod sog son soo sop sor sos spa spb spd spg spn spo spp spr sps sr- sra srb srd srg srn sro srp srr srs ss- ssa ssb ssd ssg ssn sso ssp ssr sss