rgo rgr rgs rgt rkc rke rkg rkk rko rks rkt rla rlc rld rle rlg rll rlo rlr rls rlt roa roc rod roe rog rok rol roo ror ros rot rra rrc rrd rrg rrk rrl rrr rrs rrt rsa rsc rsd rse rsg rsk rsl rso rsr rss rst rta rtc rtd rte rtg rtk rtl rto rtr rts rtt saa sac sad sae sag sak sal sao sar sas sat sca scc scd sce scg sck scl sco scr scs sct sda sdc sdd sde sdg sdk sdl sdo sdr sds sdt se- sea sec sed see seg sek sel seo ser ses set sga sgc sgd sge sgg sgk sgl sgo sgr sgs sgt sk- ska skc skd ske skg skk skl sko skr sks skt sla slc sld sle slg slk sll slo slr sls slt soa soc sod soe sog sok sol soo sor sos sot sr- sra src srd sre srg srk srl sro srr srs srt ss- ssa ssc ssd sse ssg ssk ssl sso ssr sss sst sta stc std ste stg stk stl sto str sts stt taa tac tad tae tag tak tal tao tar tas tat tca tcc tcd tce tcg tck tcl tco tcr tcs tct tda tdc tdd tde tdg tdk tdl tdo tdr tds tdt te- tea tec ted tee teg tek tel teo ter tes tet tga tgc tge tgg tgk tgl tgo tgr tgs tgt tka tkc tke tkg tkk tkl tko tkr tks tkt tla tlc tld tle tlg tlk tll tlo tlr tls tlt to- toa toc tod toe tog tok tol too tor tos tot tra trc trd tre trg trk trl tro trr trs trt tsa tsc tsd tse tsg tsk tsl tso tsr tss tst tta ttc ttd tte ttg ttk ttl tto ttr tts ttt