rgt ria ric rie rig rii rik rin rio rir ris rit rkc rke rkg rkk rko rks rkt rna rnc rng rni rnn rno rnr rns rnt roa roc roe rog roi rok ron roo ror ros rot rra rrc rrg rri rrk rrn rrr rrs rrt rsa rsc rse rsg rsi rsk rsn rso rsr rss rst rta rtc rte rtg rti rtk rtn rto rtr rts rtt saa sac sae sag sai sak san sao sar sas sat sca scc sce scg sci sck scn sco scr scs sct se- sea sec see seg sei sek sen seo ser ses set sga sgc sge sgg sgi sgk sgn sgo sgr sgs sgt sia sic sie sig sii sik sin sio sir sis sit sk- ska skc ske skg ski skk sko skr sks skt sna snc sne sng sni snk snn sno snr sns snt soa soc soe sog soi sok son soo sor sos sot sr- sra src sre srg sri srk srn sro srr srs srt ss- ssa ssc sse ssg ssi ssk ssn sso ssr sss sst sta stc ste stg sti stk stn sto str sts stt taa tac tae tag tai tak tan tao tar tas tat tca tcc tce tcg tci tck tcn tco tcr tcs tct te- tea tec tee teg tei tek ten teo ter tes tet tga tgc tge tgg tgi tgk tgn tgo tgr tgs tgt tia tic tie tig tii tik tin tio tir tis tit tka tkc tke tkg tkk tko tkr tks tkt tna tnc tne tng tni tnk tnn tno tnr tns tnt to- toa toc toe tog toi tok ton too tor tos tot tra trc tre trg tri trk trn tro trr trs trt tsa tsc tse tsg tsi tsk tsn tso tsr tss tst tta ttc tte ttg tti ttk ttn tto ttr tts ttt