ran rar ras rat rba rbb rbc rbd rbe rbg rbi rbn rbr rbs rbt rca rcb rcc rcd rce rcg rci rcn rcr rcs rct rda rdb rdc rdd rde rdg rdi rdn rdr rds rdt re- rea reb rec red ree reg rei ren rer res ret rga rgb rgc rgd rge rgg rgi rgn rgr rgs rgt ria rib ric rid rie rig rii rin rir ris rit rna rnb rnc rnd rng rni rnn rnr rns rnt rra rrb rrc rrd rrg rri rrn rrr rrs rrt rsa rsb rsc rsd rse rsg rsi rsn rsr rss rst rta rtb rtc rtd rte rtg rti rtn rtr rts rtt saa sab sac sad sae sag sai san sar sas sat sba sbb sbc sbd sbe sbg sbi sbn sbr sbs sbt sca scb scc scd sce scg sci scn scr scs sct sda sdb sdc sdd sde sdg sdi sdn sdr sds sdt se- sea seb sec sed see seg sei sen ser ses set sga sgb sgc sgd sge sgg sgi sgn sgr sgs sgt sia sib sic sid sie sig sii sin sir sis sit sna snb snc snd sne sng sni snn snr sns snt sr- sra srb src srd sre srg sri srn srr srs srt ss- ssa ssb ssc ssd sse ssg ssi ssn ssr sss sst sta stb stc std ste stg sti stn str sts stt taa tab tac tad tae tag tai tan tar tas tat tba tbb tbc tbd tbe tbg tbi tbn tbr tbs tbt tca tcb tcc tcd tce tcg tci tcn tcr tcs tct tda tdb tdc tdd tde tdg tdi tdn tdr tds tdt te- tea teb tec ted tee teg tei ten ter tes tet tga tgb tgc tge tgg tgi tgn tgr tgs tgt tia tib tic tid tie tig tii tin tir tis tit tna tnb tnc tnd tne tng tni tnn tnr tns tnt tra trb trc trd tre trg tri trn trr trs trt tsa tsb tsc tsd tse tsg tsi tsn tsr tss tst tta ttb ttc ttd tte ttg tti ttn ttr tts ttt