rad rae rag rai ral rao rar ras rat rca rcc rcd rce rcg rci rcl rco rcr rcs rct rda rdc rdd rde rdg rdi rdl rdo rdr rds rdt re- rea rec red ree reg rei rel reo rer res ret rga rgc rgd rge rgg rgi rgo rgr rgs rgt ria ric rid rie rig rii ril rio rir ris rit rla rlc rld rle rlg rli rll rlo rlr rls rlt roa roc rod roe rog roi rol roo ror ros rot rra rrc rrd rrg rri rrl rrr rrs rrt rsa rsc rsd rse rsg rsi rsl rso rsr rss rst rta rtc rtd rte rtg rti rtl rto rtr rts rtt saa sac sad sae sag sai sal sao sar sas sat sca scc scd sce scg sci scl sco scr scs sct sda sdc sdd sde sdg sdi sdl sdo sdr sds sdt se- sea sec sed see seg sei sel seo ser ses set sga sgc sgd sge sgg sgi sgl sgo sgr sgs sgt sia sic sid sie sig sii sil sio sir sis sit sla slc sld sle slg sli sll slo slr sls slt soa soc sod soe sog soi sol soo sor sos sot sr- sra src srd sre srg sri srl sro srr srs srt ss- ssa ssc ssd sse ssg ssi ssl sso ssr sss sst sta stc std ste stg sti stl sto str sts stt taa tac tad tae tag tai tal tao tar tas tat tca tcc tcd tce tcg tci tcl tco tcr tcs tct tda tdc tdd tde tdg tdi tdl tdo tdr tds tdt te- tea tec ted tee teg tei tel teo ter tes tet tga tgc tge tgg tgi tgl tgo tgr tgs tgt tia tic tid tie tig tii til tio tir tis tit tla tlc tld tle tlg tli tll tlo tlr tls tlt to- toa toc tod toe tog toi tol too tor tos tot tra trc trd tre trg tri trl tro trr trs trt tsa tsc tsd tse tsg tsi tsl tso tsr tss tst tta ttc ttd tte ttg tti ttl tto ttr tts ttt