rfi rfl rfm rfn rfo rfp rfr rfs rft rie rif rii ril rim rin rio rip rir ris rit rle rlf rli rll rlm rln rlo rlp rlr rls rlt rme rmf rmi rml rmm rmn rmo rmp rmr rms rmt rni rnm rnn rno rnp rnr rns rnt roe rof roi rol rom ron roo rop ror ros rot rpe rpf rpi rpl rpm rpn rpo rpp rpr rps rpt rrf rri rrl rrm rrn rrp rrr rrs rrt rse rsf rsi rsl rsm rsn rso rsp rsr rss rst rte rtf rti rtl rtm rtn rto rtp rtr rts rtt se- see sef sei sel sem sen seo sep ser ses set sfe sff sfi sfl sfm sfn sfo sfp sfr sfs sft sie sif sii sil sim sin sio sip sir sis sit sle slf sli sll slm sln slo slp slr sls slt sme smf smi sml smm smn smo smp smr sms smt sne snf sni snl snm snn sno snp snr sns snt soe sof soi sol som son soo sop sor sos sot spe spf spi spl spm spn spo spp spr sps spt sr- sre srf sri srl srm srn sro srp srr srs srt ss- sse ssf ssi ssl ssm ssn sso ssp ssr sss sst ste stf sti stl stm stn sto stp str sts stt te- tee tef tei tel tem ten teo tep ter tes tet tfe tff tfi tfl tfm tfn tfo tfp tfr tfs tft tie tif tii til tim tin tio tip tir tis tit tle tlf tli tll tlm tln tlo tlp tlr tls tlt tme tmf tmi tml tmm tmn tmo tmp tmr tms tmt tne tnf tni tnl tnm tnn tno tnp tnr tns tnt to- toe tof toi tol tom ton too top tor tos tot tpe tpf tpi tpl tpm tpn tpo tpp tpr tps tpt tre trf tri trl trm trn tro trp trr trs trt tse tsf tsi tsl tsm tsn tso tsp tsr tss tst tte ttf tti ttl ttm ttn tto ttp ttr tts ttt