rii rik ril rin rip rir ris rit rke rkk rkp rks rkt rla rld rle rli rll rln rlp rlr rls rlt rna rnd rni rnn rnp rnr rns rnt rpa rpd rpe rpi rpk rpl rpn rpp rpr rps rpt rra rrd rri rrk rrl rrn rrp rrr rrs rrt rsa rsd rse rsi rsk rsl rsn rsp rsr rss rst rta rtd rte rti rtk rtl rtn rtp rtr rts rtt saa sad sae sai sak sal san sap sar sas sat sda sdd sde sdi sdk sdl sdn sdp sdr sds sdt se- sea sed see sei sek sel sen sep ser ses set sia sid sie sii sik sil sin sip sir sis sit sk- ska skd ske ski skk skl skp skr sks skt sla sld sle sli slk sll sln slp slr sls slt sna snd sne sni snk snl snn snp snr sns snt spa spd spe spi spk spl spn spp spr sps spt sr- sra srd sre sri srk srl srn srp srr srs srt ss- ssa ssd sse ssi ssk ssl ssn ssp ssr sss sst sta std ste sti stk stl stn stp str sts stt taa tad tae tai tak tal tan tap tar tas tat tda tdd tde tdi tdk tdl tdn tdp tdr tds tdt te- tea ted tee tei tek tel ten tep ter tes tet tia tid tie tii tik til tin tip tir tis tit tka tke tkk tkl tkp tkr tks tkt tla tld tle tli tlk tll tln tlp tlr tls tlt tna tnd tne tni tnk tnl tnn tnp tnr tns tnt tpa tpd tpe tpi tpk tpl tpn tpp tpr tps tpt tra trd tre tri trk trl trn trp trr trs trt tsa tsd tse tsi tsk tsl tsn tsp tsr tss tst tta ttd tte tti ttk ttl ttn ttp ttr tts ttt