raa rac rad rae rag rai ran rap rar ras rat rca rcc rcd rce rcg rci rcn rcp rcr rcs rct rda rdc rdd rde rdg rdi rdn rdp rdr rds rdt re- rea rec red ree reg rei ren rep rer res ret rga rgc rgd rge rgg rgi rgn rgp rgr rgs rgt ria ric rid rie rig rii rin rip rir ris rit rna rnc rnd rng rni rnn rnp rnr rns rnt rpa rpc rpd rpe rpg rpi rpn rpp rpr rps rpt rra rrc rrd rrg rri rrn rrp rrr rrs rrt rsa rsc rsd rse rsg rsi rsn rsp rsr rss rst rta rtc rtd rte rtg rti rtn rtp rtr rts rtt saa sac sad sae sag sai san sap sar sas sat sca scc scd sce scg sci scn scp scr scs sct sda sdc sdd sde sdg sdi sdn sdp sdr sds sdt se- sea sec sed see seg sei sen sep ser ses set sga sgc sgd sge sgg sgi sgn sgp sgr sgs sgt sia sic sid sie sig sii sin sip sir sis sit sna snc snd sne sng sni snn snp snr sns snt spa spc spd spe spg spi spn spp spr sps spt sr- sra src srd sre srg sri srn srp srr srs srt ss- ssa ssc ssd sse ssg ssi ssn ssp ssr sss sst sta stc std ste stg sti stn stp str sts stt taa tac tad tae tag tai tan tap tar tas tat tca tcc tcd tce tcg tci tcn tcp tcr tcs tct tda tdc tdd tde tdg tdi tdn tdp tdr tds tdt te- tea tec ted tee teg tei ten tep ter tes tet tga tgc tge tgg tgi tgn tgp tgr tgs tgt tia tic tid tie tig tii tin tip tir tis tit tna tnc tnd tne tng tni tnn tnp tnr tns tnt tpa tpc tpd tpe tpg tpi tpn tpp tpr tps tpt tra trc trd tre trg tri trn trp trr trs trt tsa tsc tsd tse tsg tsi tsn tsp tsr tss tst tta ttc ttd tte ttg tti ttn ttp ttr tts ttt