reo rer res rev rgb rgc rgd rge rgg rgi rgn rgo rgr rgs rgv rib ric rid rie rig rii rin rio rir ris riv rnb rnc rnd rng rni rnn rno rnr rns rnv rob roc rod roe rog roi ron roo ror ros rov rrb rrc rrd rrg rri rrn rrr rrs rsb rsc rsd rse rsg rsi rsn rso rsr rss rsv rvb rvc rvd rve rvg rvi rvn rvo rvr rvs rvv sbb sbc sbd sbe sbg sbi sbn sbo sbr sbs sbv scb scc scd sce scg sci scn sco scr scs scv sdb sdc sdd sde sdg sdi sdn sdo sdr sds sdv se- seb sec sed see seg sei sen seo ser ses sev sgb sgc sgd sge sgg sgi sgn sgo sgr sgs sgv sib sic sid sie sig sii sin sio sir sis siv snb snc snd sne sng sni snn sno snr sns snv sob soc sod soe sog soi son soo sor sos sov sr- srb src srd sre srg sri srn sro srr srs srv ss- ssb ssc ssd sse ssg ssi ssn sso ssr sss ssv svb svc svd sve svg svi svn svo svr svs svv v-e vbc vbd vbg vbi vbo vbr vbs vbv vcc vcd vce vci vcn vco vcr vcs vdb vdc vdd vde vdg vdi vdo vdr vds vdv veb vec ved vee veg vei ven veo ver ves vgc vgg vgn vgo vgr vgs vi- vib vic vid vie vig vii vin vio vir vis viv vn- vnd vng vni vno vnr vns vnv vob voc vod voe vog voi von voo vor vos vov vrb vrc vrd vre vrg vri vrn vrr vrs vsb vsc vsd vse vsg vsi vsn vso vsr vss vsv vvb vvc vvg vvi vvo vvr vvs vvv