rbb rbe rbf rbg rbi rbn rbp rbr rbs rbt re- rea reb ree ref reg rei ren rep rer res ret rfa rfb rfe rff rfg rfi rfn rfp rfr rfs rft rga rgb rge rgf rgg rgi rgn rgp rgr rgs rgt ria rib rie rif rig rii rin rip rir ris rit rna rnb rng rni rnn rnp rnr rns rnt rpa rpb rpe rpf rpg rpi rpn rpp rpr rps rpt rra rrb rrf rrg rri rrn rrp rrr rrs rrt rsa rsb rse rsf rsg rsi rsn rsp rsr rss rst rta rtb rte rtf rtg rti rtn rtp rtr rts rtt saa sab sae saf sag sai san sap sar sas sat sba sbb sbe sbf sbg sbi sbn sbp sbr sbs sbt se- sea seb see sef seg sei sen sep ser ses set sfa sfb sfe sff sfg sfi sfn sfp sfr sfs sft sga sgb sge sgf sgg sgi sgn sgp sgr sgs sgt sia sib sie sif sig sii sin sip sir sis sit sna snb sne snf sng sni snn snp snr sns snt spa spb spe spf spg spi spn spp spr sps spt sr- sra srb sre srf srg sri srn srp srr srs srt ss- ssa ssb sse ssf ssg ssi ssn ssp ssr sss sst sta stb ste stf stg sti stn stp str sts stt taa tab tae taf tag tai tan tap tar tas tat tba tbb tbe tbf tbg tbi tbn tbp tbr tbs tbt te- tea teb tee tef teg tei ten tep ter tes tet tfa tfb tfe tff tfg tfi tfn tfp tfr tfs tft tga tgb tge tgf tgg tgi tgn tgp tgr tgs tgt tia tib tie tif tig tii tin tip tir tis tit tna tnb tne tnf tng tni tnn tnp tnr tns tnt tpa tpb tpe tpf tpg tpi tpn tpp tpr tps tpt tra trb tre trf trg tri trn trp trr trs trt tsa tsb tse tsf tsg tsi tsn tsp tsr tss tst tta ttb tte ttf ttg tti ttn ttp ttr tts ttt