rbi rbl rbm rbn rbr rbs rbt rca rcb rcc rcg rci rcl rcm rcn rcr rcs rct rga rgb rgc rgg rgi rgn rgr rgs rgt ria rib ric rig rii ril rim rin rir ris rit rla rlc rlg rli rll rlm rln rlr rls rlt rma rmb rmc rmg rmi rml rmm rmn rmr rms rmt rna rnb rnc rng rni rnm rnn rnr rns rnt rra rrb rrc rrg rri rrl rrm rrn rrr rrs rrt rsa rsb rsc rsg rsi rsl rsm rsn rsr rss rst rta rtb rtc rtg rti rtl rtm rtn rtr rts rtt saa sab sac sag sai sal sam san sar sas sat sba sbb sbc sbg sbi sbl sbm sbn sbr sbs sbt sca scb scc scg sci scl scm scn scr scs sct sga sgb sgc sgg sgi sgl sgm sgn sgr sgs sgt sia sib sic sig sii sil sim sin sir sis sit sla slb slc slg sli sll slm sln slr sls slt sma smb smc smg smi sml smm smn smr sms smt sna snb snc sng sni snl snm snn snr sns snt sr- sra srb src srg sri srl srm srn srr srs srt ss- ssa ssb ssc ssg ssi ssl ssm ssn ssr sss sst sta stb stc stg sti stl stm stn str sts stt taa tab tac tag tai tal tam tan tar tas tat tba tbb tbc tbg tbi tbl tbm tbn tbr tbs tbt tca tcb tcc tcg tci tcl tcm tcn tcr tcs tct tga tgb tgc tgg tgi tgl tgm tgn tgr tgs tgt tia tib tic tig tii til tim tin tir tis tit tla tlc tlg tli tll tlm tln tlr tls tlt tma tmb tmc tmg tmi tml tmm tmn tmr tms tmt tna tnb tnc tng tni tnl tnm tnn tnr tns tnt tra trb trc trg tri trl trm trn trr trs trt tsa tsb tsc tsg tsi tsl tsm tsn tsr tss tst tta ttb ttc ttg tti ttl ttm ttn ttr tts ttt