re- red ree ref rei rem ren reo rep rer res ret rfd rfe rff rfi rfm rfn rfo rfp rfr rfs rft rid rie rif rii rim rin rio rip rir ris rit rmd rme rmf rmi rmm rmn rmo rmp rmr rms rmt rnd rni rnm rnn rno rnp rnr rns rnt rod roe rof roi rom ron roo rop ror ros rot rpd rpe rpf rpi rpm rpn rpo rpp rpr rps rpt rrd rrf rri rrm rrn rrp rrr rrs rrt rsd rse rsf rsi rsm rsn rso rsp rsr rss rst rtd rte rtf rti rtm rtn rto rtp rtr rts rtt sdd sde sdf sdi sdm sdn sdo sdp sdr sds sdt se- sed see sef sei sem sen seo sep ser ses set sfd sfe sff sfi sfm sfn sfo sfp sfr sfs sft sid sie sif sii sim sin sio sip sir sis sit smd sme smf smi smm smn smo smp smr sms smt snd sne snf sni snm snn sno snp snr sns snt sod soe sof soi som son soo sop sor sos sot spd spe spf spi spm spn spo spp spr sps spt sr- srd sre srf sri srm srn sro srp srr srs srt ss- ssd sse ssf ssi ssm ssn sso ssp ssr sss sst std ste stf sti stm stn sto stp str sts stt tdd tde tdf tdi tdm tdn tdo tdp tdr tds tdt te- ted tee tef tei tem ten teo tep ter tes tet tfd tfe tff tfi tfm tfn tfo tfp tfr tfs tft tid tie tif tii tim tin tio tip tir tis tit tmd tme tmf tmi tmm tmn tmo tmp tmr tms tmt tnd tne tnf tni tnm tnn tno tnp tnr tns tnt to- tod toe tof toi tom ton too top tor tos tot tpd tpe tpf tpi tpm tpn tpo tpp tpr tps tpt trd tre trf tri trm trn tro trp trr trs trt tsd tse tsf tsi tsm tsn tso tsp tsr tss tst ttd tte ttf tti ttm ttn tto ttp ttr tts ttt