rep rer res ret rga rgb rgc rge rgg rgk rgo rgp rgr rgs rgt rkb rkc rke rkg rkk rko rkp rks rkt roa rob roc roe rog rok roo rop ror ros rot rpa rpb rpc rpe rpg rpk rpo rpp rpr rps rpt rra rrb rrc rrg rrk rrp rrr rrs rrt rsa rsb rsc rse rsg rsk rso rsp rsr rss rst rta rtb rtc rte rtg rtk rto rtp rtr rts rtt saa sab sac sae sag sak sao sap sar sas sat sba sbb sbc sbe sbg sbk sbo sbp sbr sbs sbt sca scb scc sce scg sck sco scp scr scs sct se- sea seb sec see seg sek seo sep ser ses set sga sgb sgc sge sgg sgk sgo sgp sgr sgs sgt sk- ska skb skc ske skg skk sko skp skr sks skt soa sob soc soe sog sok soo sop sor sos sot spa spb spc spe spg spk spo spp spr sps spt sr- sra srb src sre srg srk sro srp srr srs srt ss- ssa ssb ssc sse ssg ssk sso ssp ssr sss sst sta stb stc ste stg stk sto stp str sts stt taa tab tac tae tag tak tao tap tar tas tat tba tbb tbc tbe tbg tbk tbo tbp tbr tbs tbt tca tcb tcc tce tcg tck tco tcp tcr tcs tct te- tea teb tec tee teg tek teo tep ter tes tet tga tgb tgc tge tgg tgk tgo tgp tgr tgs tgt tka tkb tkc tke tkg tkk tko tkp tkr tks tkt to- toa tob toc toe tog tok too top tor tos tot tpa tpb tpc tpe tpg tpk tpo tpp tpr tps tpt tra trb trc tre trg trk tro trp trr trs trt tsa tsb tsc tse tsg tsk tso tsp tsr tss tst tta ttb ttc tte ttg ttk tto ttp ttr tts ttt