ren reo rer res ret ria ric rie rii rik ril rin rio rir ris rit rkc rke rkk rko rks rkt rla rlc rle rli rll rln rlo rlr rls rlt rna rnc rni rnn rno rnr rns rnt roa roc roe roi rok rol ron roo ror ros rot rra rrc rri rrk rrl rrn rrr rrs rrt rsa rsc rse rsi rsk rsl rsn rso rsr rss rst rta rtc rte rti rtk rtl rtn rto rtr rts rtt saa sac sae sai sak sal san sao sar sas sat sca scc sce sci sck scl scn sco scr scs sct se- sea sec see sei sek sel sen seo ser ses set sia sic sie sii sik sil sin sio sir sis sit sk- ska skc ske ski skk skl sko skr sks skt sla slc sle sli slk sll sln slo slr sls slt sna snc sne sni snk snl snn sno snr sns snt soa soc soe soi sok sol son soo sor sos sot sr- sra src sre sri srk srl srn sro srr srs srt ss- ssa ssc sse ssi ssk ssl ssn sso ssr sss sst sta stc ste sti stk stl stn sto str sts stt taa tac tae tai tak tal tan tao tar tas tat tca tcc tce tci tck tcl tcn tco tcr tcs tct te- tea tec tee tei tek tel ten teo ter tes tet tia tic tie tii tik til tin tio tir tis tit tka tkc tke tkk tkl tko tkr tks tkt tla tlc tle tli tlk tll tln tlo tlr tls tlt tna tnc tne tni tnk tnl tnn tno tnr tns tnt to- toa toc toe toi tok tol ton too tor tos tot tra trc tre tri trk trl trn tro trr trs trt tsa tsc tse tsi tsk tsl tsn tso tsr tss tst tta ttc tte tti ttk ttl ttn tto ttr tts ttt