rcp rcr rcs rct rdc rdd rde rdf rdi rdn rdo rdp rdr rds rdt re- rec red ree ref rei ren reo rep rer res ret rfc rfd rfe rff rfi rfn rfo rfp rfr rfs rft ric rid rie rif rii rin rio rip rir ris rit rnc rnd rni rnn rno rnp rnr rns rnt roc rod roe rof roi ron roo rop ror ros rot rpc rpd rpe rpf rpi rpn rpo rpp rpr rps rpt rrc rrd rrf rri rrn rrp rrr rrs rrt rsc rsd rse rsf rsi rsn rso rsp rsr rss rst rtc rtd rte rtf rti rtn rto rtp rtr rts rtt scc scd sce scf sci scn sco scp scr scs sct sdc sdd sde sdf sdi sdn sdo sdp sdr sds sdt se- sec sed see sef sei sen seo sep ser ses set sfc sfd sfe sff sfi sfn sfo sfp sfr sfs sft sic sid sie sif sii sin sio sip sir sis sit snc snd sne snf sni snn sno snp snr sns snt soc sod soe sof soi son soo sop sor sos sot spc spd spe spf spi spn spo spp spr sps spt sr- src srd sre srf sri srn sro srp srr srs srt ss- ssc ssd sse ssf ssi ssn sso ssp ssr sss sst stc std ste stf sti stn sto stp str sts stt tcc tcd tce tcf tci tcn tco tcp tcr tcs tct tdc tdd tde tdf tdi tdn tdo tdp tdr tds tdt te- tec ted tee tef tei ten teo tep ter tes tet tfc tfd tfe tff tfi tfn tfo tfp tfr tfs tft tic tid tie tif tii tin tio tip tir tis tit tnc tnd tne tnf tni tnn tno tnp tnr tns tnt to- toc tod toe tof toi ton too top tor tos tot tpc tpd tpe tpf tpi tpn tpo tpp tpr tps tpt trc trd tre trf tri trn tro trp trr trs trt tsc tsd tse tsf tsi tsn tso tsp tsr tss tst ttc ttd tte ttf tti ttn tto ttp ttr tts ttt