ret rga rgb rgc rge rgg rgi rgk rgo rgr rgs rgt ria rib ric rie rig rii rik rio rir ris rit rkb rkc rke rkg rkk rko rks rkt roa rob roc roe rog roi rok roo ror ros rot rra rrb rrc rrg rri rrk rrr rrs rrt rsa rsb rsc rse rsg rsi rsk rso rsr rss rst rta rtb rtc rte rtg rti rtk rto rtr rts rtt saa sab sac sae sag sai sak sao sar sas sat sba sbb sbc sbe sbg sbi sbk sbo sbr sbs sbt sca scb scc sce scg sci sck sco scr scs sct se- sea seb sec see seg sei sek seo ser ses set sga sgb sgc sge sgg sgi sgk sgo sgr sgs sgt sia sib sic sie sig sii sik sio sir sis sit sk- ska skb skc ske skg ski skk sko skr sks skt soa sob soc soe sog soi sok soo sor sos sot sr- sra srb src sre srg sri srk sro srr srs srt ss- ssa ssb ssc sse ssg ssi ssk sso ssr sss sst sta stb stc ste stg sti stk sto str sts stt taa tab tac tae tag tai tak tao tar tas tat tba tbb tbc tbe tbg tbi tbk tbo tbr tbs tbt tca tcb tcc tce tcg tci tck tco tcr tcs tct te- tea teb tec tee teg tei tek teo ter tes tet tga tgb tgc tge tgg tgi tgk tgo tgr tgs tgt tia tib tic tie tig tii tik tio tir tis tit tka tkb tkc tke tkg tkk tko tkr tks tkt to- toa tob toc toe tog toi tok too tor tos tot tra trb trc tre trg tri trk tro trr trs trt tsa tsb tsc tse tsg tsi tsk tso tsr tss tst tta ttb ttc tte ttg tti ttk tto ttr tts ttt