rbt rfa rfb rff rfg rfi rfm rfn rfo rfr rfs rft rga rgb rgf rgg rgi rgn rgo rgr rgs rgt ria rib rif rig rii rim rin rio rir ris rit rma rmb rmf rmg rmi rmm rmn rmo rmr rms rmt rna rnb rng rni rnm rnn rno rnr rns rnt roa rob rof rog roi rom ron roo ror ros rot rra rrb rrf rrg rri rrm rrn rrr rrs rrt rsa rsb rsf rsg rsi rsm rsn rso rsr rss rst rta rtb rtf rtg rti rtm rtn rto rtr rts rtt saa sab saf sag sai sam san sao sar sas sat sba sbb sbf sbg sbi sbm sbn sbo sbr sbs sbt sfa sfb sff sfg sfi sfm sfn sfo sfr sfs sft sga sgb sgf sgg sgi sgm sgn sgo sgr sgs sgt sia sib sif sig sii sim sin sio sir sis sit sma smb smf smg smi smm smn smo smr sms smt sna snb snf sng sni snm snn sno snr sns snt soa sob sof sog soi som son soo sor sos sot sr- sra srb srf srg sri srm srn sro srr srs srt ss- ssa ssb ssf ssg ssi ssm ssn sso ssr sss sst sta stb stf stg sti stm stn sto str sts stt taa tab taf tag tai tam tan tao tar tas tat tba tbb tbf tbg tbi tbm tbn tbo tbr tbs tbt tfa tfb tff tfg tfi tfm tfn tfo tfr tfs tft tga tgb tgf tgg tgi tgm tgn tgo tgr tgs tgt tia tib tif tig tii tim tin tio tir tis tit tma tmb tmf tmg tmi tmm tmn tmo tmr tms tmt tna tnb tnf tng tni tnm tnn tno tnr tns tnt to- toa tob tof tog toi tom ton too tor tos tot tra trb trf trg tri trm trn tro trr trs trt tsa tsb tsf tsg tsi tsm tsn tso tsr tss tst tta ttb ttf ttg tti ttm ttn tto ttr tts ttt