a-a a-b aaa aab aad aag aak aan aar aas ab- aba abb abd abg abk abn abr abs ad- ada adb add adg adk adn adr ads ag- aga agb agd agg agk agn agr ags aka akb akd akg akk akn akr aks an- ana anb and ang ank ann anr ans ar- ara arb ard arg ark arn arr ars as- asa asb asd asg ask asn asr ass baa bab bad bag bak ban bar bas bba bbb bbd bbg bbk bbn bbr bbs bda bdb bdd bdg bdk bdr bds bga bgb bgd bgg bgk bgn bgr bgs bka bkb bkg bkk bkn bkr bks bna bnb bnd bng bnk bnn bnr bns bra brb brd brg brk brn brr brs bsa bsb bsd bsg bsk bsn bsr bss daa dab dad dag dak dan dar das dba dbb dbd dbg dbk dbn dbr dbs dda ddb ddd ddg ddk ddn ddr dds dga dgd dgg dgk dgn dgr dgs dka dkb dkg dkk dkr dks dna dnb dnd dng dnk dnn dnr dns dra drb drd drg drk drn drr drs dsa dsb dsd dsg dsk dsn dsr dss g-d gaa gab gad gag gak gan gar gas gba gbd gbg gbk gbn gbr gbs gda gdb gdd gdk gdn gdr gds gga ggb ggd ggg ggn ggr ggs gka gkb gkd gkn gks gna gnb gnd gnn gnr gns gra grb grd grg grk grn grr grs gsa gsb gsd gsg gsk gsn gsr gss ka- kaa kab kad kag kak kan kar kas kba kbb kbd kbk kbn kbr kbs kda kdb kdg kdk kdr kds kga kgb kgd kgs kkb kkk kkn kkr kks kn- kna knd kng knk knn knr kra krd krg krk krn krr krs ksa ksb ksd ksg ksk ksn ksr kss naa nab nad nag nak nan nar nas nba nbb nbd nbg nbk nbn nbr nbs nda ndb ndd ndg ndk ndn ndr nds nga ngb ngd ngg ngk ngn ngs nka nkk nkn nkr nks nna nnb nng nnk nnn nns nra nrb nrd nrg nrk nrn nrr nrs nsa nsb nsd nsg nsk nsn nsr nss ra- raa rab rad rag rak ran rar ras rba rbb rbd rbg rbk rbn rbr rbs rda rdb rdd rdg rdn rdr rds rga rgb rgd rgg rgk rgn rgr rgs rkb rkg rkk rks rna rnb rnd rng rnn rnr rns rra rrb rrd rrg rrk rrn rrr rrs rsa rsb rsd rsg rsk rsn rsr rss saa sab sad sag sak san sar sas sba sbb sbd sbg sbk sbn sbr sbs sda sdb sdd sdg sdk sdn sdr sds sga sgb sgd sgg sgk sgn sgr sgs sk- ska skb skd skg skk skr sks sna snb snd sng snk snn snr sns sr- sra srb srd srg srk srn srr srs ss- ssa ssb ssd ssg ssk ssn ssr sss