rdo rdr rds rdt re- rec red ree reg rei rel ren reo rer res ret rgc rgd rge rgg rgi rgn rgo rgr rgs rgt ric rid rie rig rii ril rin rio rir ris rit rlc rld rle rlg rli rll rln rlo rlr rls rlt rnc rnd rng rni rnn rno rnr rns rnt roc rod roe rog roi rol ron roo ror ros rot rrc rrd rrg rri rrl rrn rrr rrs rrt rsc rsd rse rsg rsi rsl rsn rso rsr rss rst rtc rtd rte rtg rti rtl rtn rto rtr rts rtt scc scd sce scg sci scl scn sco scr scs sct sdc sdd sde sdg sdi sdl sdn sdo sdr sds sdt se- sec sed see seg sei sel sen seo ser ses set sgc sgd sge sgg sgi sgl sgn sgo sgr sgs sgt sic sid sie sig sii sil sin sio sir sis sit slc sld sle slg sli sll sln slo slr sls slt snc snd sne sng sni snl snn sno snr sns snt soc sod soe sog soi sol son soo sor sos sot sr- src srd sre srg sri srl srn sro srr srs srt ss- ssc ssd sse ssg ssi ssl ssn sso ssr sss sst stc std ste stg sti stl stn sto str sts stt tcc tcd tce tcg tci tcl tcn tco tcr tcs tct tdc tdd tde tdg tdi tdl tdn tdo tdr tds tdt te- tec ted tee teg tei tel ten teo ter tes tet tgc tge tgg tgi tgl tgn tgo tgr tgs tgt tic tid tie tig tii til tin tio tir tis tit tlc tld tle tlg tli tll tln tlo tlr tls tlt tnc tnd tne tng tni tnl tnn tno tnr tns tnt to- toc tod toe tog toi tol ton too tor tos tot trc trd tre trg tri trl trn tro trr trs trt tsc tsd tse tsg tsi tsl tsn tso tsr tss tst ttc ttd tte ttg tti ttl ttn tto ttr tts ttt