rbg rbi rbl rbo rbr rbs rbt re- rea reb ree ref reg rei rel reo rer res ret rfa rfb rfe rff rfg rfi rfl rfo rfr rfs rft rga rgb rge rgf rgg rgi rgo rgr rgs rgt ria rib rie rif rig rii ril rio rir ris rit rla rle rlf rlg rli rll rlo rlr rls rlt roa rob roe rof rog roi rol roo ror ros rot rra rrb rrf rrg rri rrl rrr rrs rrt rsa rsb rse rsf rsg rsi rsl rso rsr rss rst rta rtb rte rtf rtg rti rtl rto rtr rts rtt saa sab sae saf sag sai sal sao sar sas sat sba sbb sbe sbf sbg sbi sbl sbo sbr sbs sbt se- sea seb see sef seg sei sel seo ser ses set sfa sfb sfe sff sfg sfi sfl sfo sfr sfs sft sga sgb sge sgf sgg sgi sgl sgo sgr sgs sgt sia sib sie sif sig sii sil sio sir sis sit sla slb sle slf slg sli sll slo slr sls slt soa sob soe sof sog soi sol soo sor sos sot sr- sra srb sre srf srg sri srl sro srr srs srt ss- ssa ssb sse ssf ssg ssi ssl sso ssr sss sst sta stb ste stf stg sti stl sto str sts stt taa tab tae taf tag tai tal tao tar tas tat tba tbb tbe tbf tbg tbi tbl tbo tbr tbs tbt te- tea teb tee tef teg tei tel teo ter tes tet tfa tfb tfe tff tfg tfi tfl tfo tfr tfs tft tga tgb tge tgf tgg tgi tgl tgo tgr tgs tgt tia tib tie tif tig tii til tio tir tis tit tla tle tlf tlg tli tll tlo tlr tls tlt to- toa tob toe tof tog toi tol too tor tos tot tra trb tre trf trg tri trl tro trr trs trt tsa tsb tse tsf tsg tsi tsl tso tsr tss tst tta ttb tte ttf ttg tti ttl tto ttr tts ttt