rae rag rai ral rap rar ras rat rba rbb rbc rbe rbg rbi rbl rbp rbr rbs rbt rca rcb rcc rce rcg rci rcl rcp rcr rcs rct re- rea reb rec ree reg rei rel rep rer res ret rga rgb rgc rge rgg rgi rgp rgr rgs rgt ria rib ric rie rig rii ril rip rir ris rit rla rlc rle rlg rli rll rlp rlr rls rlt rpa rpb rpc rpe rpg rpi rpl rpp rpr rps rpt rra rrb rrc rrg rri rrl rrp rrr rrs rrt rsa rsb rsc rse rsg rsi rsl rsp rsr rss rst rta rtb rtc rte rtg rti rtl rtp rtr rts rtt saa sab sac sae sag sai sal sap sar sas sat sba sbb sbc sbe sbg sbi sbl sbp sbr sbs sbt sca scb scc sce scg sci scl scp scr scs sct se- sea seb sec see seg sei sel sep ser ses set sga sgb sgc sge sgg sgi sgl sgp sgr sgs sgt sia sib sic sie sig sii sil sip sir sis sit sla slb slc sle slg sli sll slp slr sls slt spa spb spc spe spg spi spl spp spr sps spt sr- sra srb src sre srg sri srl srp srr srs srt ss- ssa ssb ssc sse ssg ssi ssl ssp ssr sss sst sta stb stc ste stg sti stl stp str sts stt taa tab tac tae tag tai tal tap tar tas tat tba tbb tbc tbe tbg tbi tbl tbp tbr tbs tbt tca tcb tcc tce tcg tci tcl tcp tcr tcs tct te- tea teb tec tee teg tei tel tep ter tes tet tga tgb tgc tge tgg tgi tgl tgp tgr tgs tgt tia tib tic tie tig tii til tip tir tis tit tla tlc tle tlg tli tll tlp tlr tls tlt tpa tpb tpc tpe tpg tpi tpl tpp tpr tps tpt tra trb trc tre trg tri trl trp trr trs trt tsa tsb tsc tse tsg tsi tsl tsp tsr tss tst tta ttb ttc tte ttg tti ttl ttp ttr tts ttt