rke rkf rkk rkm rko rks rkt rma rme rmf rmi rmm rmn rmo rmr rms rmt rna rni rnm rnn rno rnr rns rnt roa roe rof roi rok rom ron roo ror ros rot rra rrf rri rrk rrm rrn rrr rrs rrt rsa rse rsf rsi rsk rsm rsn rso rsr rss rst rta rte rtf rti rtk rtm rtn rto rtr rts rtt saa sae saf sai sak sam san sao sar sas sat se- sea see sef sei sek sem sen seo ser ses set sfa sfe sff sfi sfk sfm sfn sfo sfr sfs sft sia sie sif sii sik sim sin sio sir sis sit sk- ska ske skf ski skk skm sko skr sks skt sma sme smf smi smk smm smn smo smr sms smt sna sne snf sni snk snm snn sno snr sns snt soa soe sof soi sok som son soo sor sos sot sr- sra sre srf sri srk srm srn sro srr srs srt ss- ssa sse ssf ssi ssk ssm ssn sso ssr sss sst sta ste stf sti stk stm stn sto str sts stt taa tae taf tai tak tam tan tao tar tas tat te- tea tee tef tei tek tem ten teo ter tes tet tfa tfe tff tfi tfk tfm tfn tfo tfr tfs tft tia tie tif tii tik tim tin tio tir tis tit tka tke tkk tkm tko tkr tks tkt tma tme tmf tmi tmk tmm tmn tmo tmr tms tmt tna tne tnf tni tnk tnm tnn tno tnr tns tnt to- toa toe tof toi tok tom ton too tor tos tot tra tre trf tri trk trm trn tro trr trs trt tsa tse tsf tsi tsk tsm tsn tso tsr tss tst tta tte ttf tti ttk ttm ttn tto ttr tts ttt