-er a-a a-b aaa aab aae aag aan aar aas aav ab- aba abb abe abg abn abr abs abv aea aeb aee aeg aen aer aes aev ag- aga agb age agg agn agr ags agv an- ana anb ane ang ann anr ans anv ar- ara arb are arg arn arr ars arv as- asa asb ase asg asn asr ass asv av- ava avb ave avg avn avr avs baa bab bae bag ban bar bas bav bba bbb bbe bbg bbn bbr bbs be- bea beb bee beg ben ber bes bev bga bgb bge bgg bgn bgr bgs bgv bna bnb bne bng bnn bnr bns bnv bra brb bre brg brn brr brs brv bsa bsb bse bsg bsn bsr bss bsv bva bvb bve bvg bvn bvr bvs bvv eaa eab eae eag ean ear eas eav eba ebb ebe ebg ebn ebr ebs ebv eea eeb eee eeg een eer ees eev ega egb ege egg egn egr egs en- ena enb ene eng enn enr ens env era erb ere erg ern err ers erv es- esa esb ese esg esn esr ess esv eva evb eve evg evn evr evs evv gaa gab gae gag gan gar gas gav gba gbe gbg gbn gbr gbs gbv ge- gea geb gee geg gen ger ges gev gga ggb ggg ggn ggr ggs ggv gna gnb gne gnn gnr gns gnv gra grb gre grg grn grr grs grv gsa gsb gse gsg gsn gsr gss gsv gva gvb gve gvg gvn gvr gvs naa nab nae nag nan nar nas nav nba nbb nbe nbg nbn nbr nbs nbv ne- nea neb nee neg nen ner nes nev nga ngb nge ngg ngn ngs nna nnb nne nng nnn nns nnv nra nrb nre nrg nrn nrr nrs nrv nsa nsb nse nsg nsn nsr nss nsv nva nvb nve nvg nvn nvv ra- raa rab rae rag ran rar ras rav rba rbb rbe rbg rbn rbr rbs re- rea reb ree reg ren rer res rev rga rgb rge rgg rgn rgr rgs rgv rna rnb rng rnn rnr rns rnv rra rrb rrg rrn rrr rrs rsa rsb rse rsg rsn rsr rss rsv rva rvb rve rvg rvn rvr rvs rvv saa sab sae sag san sar sas sav sba sbb sbe sbg sbn sbr sbs sbv se- sea seb see seg sen ser ses sev sga sgb sge sgg sgn sgr sgs sgv sna snb sne sng snn snr sns snv sr- sra srb sre srg srn srr srs srv ss- ssa ssb sse ssg ssn ssr sss ssv sva svb sve svg svn svr svs svv v-a v-e vaa vab vae vag van var vas vav vba vbg vbr vbs vbv vea veb vee veg ven ver ves vga vgg vgn vgr vgs vn- vna vng vnr vns vnv vra vrb vre vrg vrn vrr vrs vsa vsb vse vsg vsn vsr vss vsv vva vvb vvg vvr vvs vvv