rct re- rec ree ref rei rel ren reo rep rer res ret rfc rfe rff rfi rfl rfn rfo rfp rfr rfs rft ric rie rif rii ril rin rio rip rir ris rit rlc rle rlf rli rll rln rlo rlp rlr rls rlt rnc rni rnn rno rnp rnr rns rnt roc roe rof roi rol ron roo rop ror ros rot rpc rpe rpf rpi rpl rpn rpo rpp rpr rps rpt rrc rrf rri rrl rrn rrp rrr rrs rrt rsc rse rsf rsi rsl rsn rso rsp rsr rss rst rtc rte rtf rti rtl rtn rto rtp rtr rts rtt scc sce scf sci scl scn sco scp scr scs sct se- sec see sef sei sel sen seo sep ser ses set sfc sfe sff sfi sfl sfn sfo sfp sfr sfs sft sic sie sif sii sil sin sio sip sir sis sit slc sle slf sli sll sln slo slp slr sls slt snc sne snf sni snl snn sno snp snr sns snt soc soe sof soi sol son soo sop sor sos sot spc spe spf spi spl spn spo spp spr sps spt sr- src sre srf sri srl srn sro srp srr srs srt ss- ssc sse ssf ssi ssl ssn sso ssp ssr sss sst stc ste stf sti stl stn sto stp str sts stt tcc tce tcf tci tcl tcn tco tcp tcr tcs tct te- tec tee tef tei tel ten teo tep ter tes tet tfc tfe tff tfi tfl tfn tfo tfp tfr tfs tft tic tie tif tii til tin tio tip tir tis tit tlc tle tlf tli tll tln tlo tlp tlr tls tlt tnc tne tnf tni tnl tnn tno tnp tnr tns tnt to- toc toe tof toi tol ton too top tor tos tot tpc tpe tpf tpi tpl tpn tpo tpp tpr tps tpt trc tre trf tri trl trn tro trp trr trs trt tsc tse tsf tsi tsl tsn tso tsp tsr tss tst ttc tte ttf tti ttl ttn tto ttp ttr tts ttt