rit rkc rke rkg rkk rks rkt rla rlc rle rlg rli rll rln rlr rls rlt rna rnc rng rni rnn rnr rns rnt rra rrc rrg rri rrk rrl rrn rrr rrs rrt rsa rsc rse rsg rsi rsk rsl rsn rsr rss rst rta rtc rte rtg rti rtk rtl rtn rtr rts rtt saa sac sae sag sai sak sal san sar sas sat sca scc sce scg sci sck scl scn scr scs sct se- sea sec see seg sei sek sel sen ser ses set sga sgc sge sgg sgi sgk sgl sgn sgr sgs sgt sia sic sie sig sii sik sil sin sir sis sit sk- ska skc ske skg ski skk skl skr sks skt sla slc sle slg sli slk sll sln slr sls slt sna snc sne sng sni snk snl snn snr sns snt sr- sra src sre srg sri srk srl srn srr srs srt ss- ssa ssc sse ssg ssi ssk ssl ssn ssr sss sst sta stc ste stg sti stk stl stn str sts stt taa tac tae tag tai tak tal tan tar tas tat tca tcc tce tcg tci tck tcl tcn tcr tcs tct te- tea tec tee teg tei tek tel ten ter tes tet tga tgc tge tgg tgi tgk tgl tgn tgr tgs tgt tia tic tie tig tii tik til tin tir tis tit tka tkc tke tkg tkk tkl tkr tks tkt tla tlc tle tlg tli tlk tll tln tlr tls tlt tna tnc tne tng tni tnk tnl tnn tnr tns tnt tra trc tre trg tri trk trl trn trr trs trt tsa tsc tse tsg tsi tsk tsl tsn tsr tss tst tta ttc tte ttg tti ttk ttl ttn ttr tts ttt