rar ras rat rca rcc rce rcf rcg rci rcl rco rcr rcs rct re- rea rec ree ref reg rei rel reo rer res ret rfa rfc rfe rff rfg rfi rfl rfo rfr rfs rft rga rgc rge rgf rgg rgi rgo rgr rgs rgt ria ric rie rif rig rii ril rio rir ris rit rla rlc rle rlf rlg rli rll rlo rlr rls rlt roa roc roe rof rog roi rol roo ror ros rot rra rrc rrf rrg rri rrl rrr rrs rrt rsa rsc rse rsf rsg rsi rsl rso rsr rss rst rta rtc rte rtf rtg rti rtl rto rtr rts rtt saa sac sae saf sag sai sal sao sar sas sat sca scc sce scf scg sci scl sco scr scs sct se- sea sec see sef seg sei sel seo ser ses set sfa sfc sfe sff sfg sfi sfl sfo sfr sfs sft sga sgc sge sgf sgg sgi sgl sgo sgr sgs sgt sia sic sie sif sig sii sil sio sir sis sit sla slc sle slf slg sli sll slo slr sls slt soa soc soe sof sog soi sol soo sor sos sot sr- sra src sre srf srg sri srl sro srr srs srt ss- ssa ssc sse ssf ssg ssi ssl sso ssr sss sst sta stc ste stf stg sti stl sto str sts stt taa tac tae taf tag tai tal tao tar tas tat tca tcc tce tcf tcg tci tcl tco tcr tcs tct te- tea tec tee tef teg tei tel teo ter tes tet tfa tfc tfe tff tfg tfi tfl tfo tfr tfs tft tga tgc tge tgf tgg tgi tgl tgo tgr tgs tgt tia tic tie tif tig tii til tio tir tis tit tla tlc tle tlf tlg tli tll tlo tlr tls tlt to- toa toc toe tof tog toi tol too tor tos tot tra trc tre trf trg tri trl tro trr trs trt tsa tsc tse tsf tsg tsi tsl tso tsr tss tst tta ttc tte ttf ttg tti ttl tto ttr tts ttt