ref reh rel reo rep rer res ret rfc rfd rfe rff rfh rfl rfo rfp rfr rfs rft rh- rhc rhd rhe rhf rhh rhl rho rhp rhr rhs rht rlc rld rle rlf rlh rll rlo rlp rlr rls rlt roc rod roe rof roh rol roo rop ror ros rot rpc rpd rpe rpf rph rpl rpo rpp rpr rps rpt rrc rrd rrf rrh rrl rrp rrr rrs rrt rsc rsd rse rsf rsh rsl rso rsp rsr rss rst rtc rtd rte rtf rtl rto rtp rtr rts rtt scc scd sce scf sch scl sco scp scr scs sct sdc sdd sde sdf sdh sdl sdo sdp sdr sds sdt se- sec sed see sef seh sel seo sep ser ses set sfc sfd sfe sff sfh sfl sfo sfp sfr sfs sft sh- shc shd she shf shh shl sho shp shr shs sht slc sld sle slf slh sll slo slp slr sls slt soc sod soe sof soh sol soo sop sor sos sot spc spd spe spf sph spl spo spp spr sps spt sr- src srd sre srf srh srl sro srp srr srs srt ss- ssc ssd sse ssf ssh ssl sso ssp ssr sss sst stc std ste stf sth stl sto stp str sts stt tcc tcd tce tcf tch tcl tco tcp tcr tcs tct tdc tdd tde tdf tdh tdl tdo tdp tdr tds tdt te- tec ted tee tef teh tel teo tep ter tes tet tfc tfd tfe tff tfh tfl tfo tfp tfr tfs tft th- thc thd the thf thh thl tho thp thr ths tht tlc tld tle tlf tlh tll tlo tlp tlr tls tlt to- toc tod toe tof toh tol too top tor tos tot tpc tpd tpe tpf tph tpl tpo tpp tpr tps tpt trc trd tre trf trh trl tro trp trr trs trt tsc tsd tse tsf tsh tsl tso tsp tsr tss tst ttc ttd tte ttf tth ttl tto ttp ttr tts ttt