rgg rgi rgk rgn rgr rgs rgt ria ric rid rie rig rii rik rin rir ris rit rkc rke rkg rkk rks rkt rna rnc rnd rng rni rnn rnr rns rnt rra rrc rrd rrg rri rrk rrn rrr rrs rrt rsa rsc rsd rse rsg rsi rsk rsn rsr rss rst rta rtc rtd rte rtg rti rtk rtn rtr rts rtt saa sac sad sae sag sai sak san sar sas sat sca scc scd sce scg sci sck scn scr scs sct sda sdc sdd sde sdg sdi sdk sdn sdr sds sdt se- sea sec sed see seg sei sek sen ser ses set sga sgc sgd sge sgg sgi sgk sgn sgr sgs sgt sia sic sid sie sig sii sik sin sir sis sit sk- ska skc skd ske skg ski skk skr sks skt sna snc snd sne sng sni snk snn snr sns snt sr- sra src srd sre srg sri srk srn srr srs srt ss- ssa ssc ssd sse ssg ssi ssk ssn ssr sss sst sta stc std ste stg sti stk stn str sts stt taa tac tad tae tag tai tak tan tar tas tat tca tcc tcd tce tcg tci tck tcn tcr tcs tct tda tdc tdd tde tdg tdi tdk tdn tdr tds tdt te- tea tec ted tee teg tei tek ten ter tes tet tga tgc tge tgg tgi tgk tgn tgr tgs tgt tia tic tid tie tig tii tik tin tir tis tit tka tkc tke tkg tkk tkr tks tkt tna tnc tnd tne tng tni tnk tnn tnr tns tnt tra trc trd tre trg tri trk trn trr trs trt tsa tsc tsd tse tsg tsi tsk tsn tsr tss tst tta ttc ttd tte ttg tti ttk ttn ttr tts ttt