rin rir ris rit rkb rke rkf rkk rks rkt rla rle rlf rli rll rln rlr rls rlt rna rnb rni rnn rnr rns rnt rra rrb rrf rri rrk rrl rrn rrr rrs rrt rsa rsb rse rsf rsi rsk rsl rsn rsr rss rst rta rtb rte rtf rti rtk rtl rtn rtr rts rtt saa sab sae saf sai sak sal san sar sas sat sba sbb sbe sbf sbi sbk sbl sbn sbr sbs sbt se- sea seb see sef sei sek sel sen ser ses set sfa sfb sfe sff sfi sfk sfl sfn sfr sfs sft sia sib sie sif sii sik sil sin sir sis sit sk- ska skb ske skf ski skk skl skr sks skt sla slb sle slf sli slk sll sln slr sls slt sna snb sne snf sni snk snl snn snr sns snt sr- sra srb sre srf sri srk srl srn srr srs srt ss- ssa ssb sse ssf ssi ssk ssl ssn ssr sss sst sta stb ste stf sti stk stl stn str sts stt taa tab tae taf tai tak tal tan tar tas tat tba tbb tbe tbf tbi tbk tbl tbn tbr tbs tbt te- tea teb tee tef tei tek tel ten ter tes tet tfa tfb tfe tff tfi tfk tfl tfn tfr tfs tft tia tib tie tif tii tik til tin tir tis tit tka tkb tke tkk tkl tkr tks tkt tla tle tlf tli tlk tll tln tlr tls tlt tna tnb tne tnf tni tnk tnl tnn tnr tns tnt tra trb tre trf tri trk trl trn trr trs trt tsa tsb tse tsf tsi tsk tsl tsn tsr tss tst tta ttb tte ttf tti ttk ttl ttn ttr tts ttt