raa rac rae rag rai ral rao rap rar ras rat rca rcc rce rcg rci rcl rco rcp rcr rcs rct re- rea rec ree reg rei rel reo rep rer res ret rga rgc rge rgg rgi rgo rgp rgr rgs rgt ria ric rie rig rii ril rio rip rir ris rit rla rlc rle rlg rli rll rlo rlp rlr rls rlt roa roc roe rog roi rol roo rop ror ros rot rpa rpc rpe rpg rpi rpl rpo rpp rpr rps rpt rra rrc rrg rri rrl rrp rrr rrs rrt rsa rsc rse rsg rsi rsl rso rsp rsr rss rst rta rtc rte rtg rti rtl rto rtp rtr rts rtt saa sac sae sag sai sal sao sap sar sas sat sca scc sce scg sci scl sco scp scr scs sct se- sea sec see seg sei sel seo sep ser ses set sga sgc sge sgg sgi sgl sgo sgp sgr sgs sgt sia sic sie sig sii sil sio sip sir sis sit sla slc sle slg sli sll slo slp slr sls slt soa soc soe sog soi sol soo sop sor sos sot spa spc spe spg spi spl spo spp spr sps spt sr- sra src sre srg sri srl sro srp srr srs srt ss- ssa ssc sse ssg ssi ssl sso ssp ssr sss sst sta stc ste stg sti stl sto stp str sts stt taa tac tae tag tai tal tao tap tar tas tat tca tcc tce tcg tci tcl tco tcp tcr tcs tct te- tea tec tee teg tei tel teo tep ter tes tet tga tgc tge tgg tgi tgl tgo tgp tgr tgs tgt tia tic tie tig tii til tio tip tir tis tit tla tlc tle tlg tli tll tlo tlp tlr tls tlt to- toa toc toe tog toi tol too top tor tos tot tpa tpc tpe tpg tpi tpl tpo tpp tpr tps tpt tra trc tre trg tri trl tro trp trr trs trt tsa tsc tse tsg tsi tsl tso tsp tsr tss tst tta ttc tte ttg tti ttl tto ttp ttr tts ttt