-er bbb bbe bbg bbr bbs bbt be- beb bee beg ber bes bet bev bgb bge bgg bgr bgs bgt bgv brb bre brg brr brs brt brv bsb bse bsg bsr bss bst bsv btb bte btg btr bts btt btv bvb bve bvg bvr bvs bvt bvv ebb ebe ebg ebr ebs ebt ebv eeb eee eeg eer ees eet eev egb ege egg egr egs egt erb ere erg err ers ert erv es- esb ese esg esr ess est esv etb ete etg etr ets ett etv evb eve evg evr evs evt evv gbe gbg gbr gbs gbt gbv ge- geb gee geg ger ges get gev ggb ggg ggr ggs ggt ggv grb gre grg grr grs grt grv gsb gse gsg gsr gss gst gsv gtb gte gtg gtr gts gtt gtv gvb gve gvg gvr gvs gvt rbb rbe rbg rbr rbs rbt re- reb ree reg rer res ret rev rgb rge rgg rgr rgs rgt rgv rrb rrg rrr rrs rrt rsb rse rsg rsr rss rst rsv rtb rte rtg rtr rts rtt rtv rvb rve rvg rvr rvs rvt rvv sbb sbe sbg sbr sbs sbt sbv se- seb see seg ser ses set sev sgb sge sgg sgr sgs sgt sgv sr- srb sre srg srr srs srt srv ss- ssb sse ssg ssr sss sst ssv stb ste stg str sts stt stv svb sve svg svr svs svt svv tbb tbe tbg tbr tbs tbt tbv te- teb tee teg ter tes tet tev tgb tge tgg tgr tgs tgt tgv trb tre trg trr trs trt trv tsb tse tsg tsr tss tst tsv ttb tte ttg ttr tts ttt ttv tvb tve tvg tvr tvs tvt v-e vbg vbr vbs vbv veb vee veg ver ves vet vgg vgr vgs vgt vrb vre vrg vrr vrs vrt vsb vse vsg vsr vss vst vsv vtb vte vtg vtr vts vtt vtv vvb vvg vvr vvs vvt vvv