ref reh rei ren reo rer res ret rfb rfc rfe rff rfh rfi rfn rfo rfr rfs rft rh- rhb rhc rhe rhf rhh rhi rhn rho rhr rhs rht rib ric rie rif rih rii rin rio rir ris rit rnb rnc rnh rni rnn rno rnr rns rnt rob roc roe rof roh roi ron roo ror ros rot rrb rrc rrf rrh rri rrn rrr rrs rrt rsb rsc rse rsf rsh rsi rsn rso rsr rss rst rtb rtc rte rtf rti rtn rto rtr rts rtt sbb sbc sbe sbf sbh sbi sbn sbo sbr sbs sbt scb scc sce scf sch sci scn sco scr scs sct se- seb sec see sef seh sei sen seo ser ses set sfb sfc sfe sff sfh sfi sfn sfo sfr sfs sft sh- shb shc she shf shh shi shn sho shr shs sht sib sic sie sif sih sii sin sio sir sis sit snb snc sne snf sni snn sno snr sns snt sob soc soe sof soh soi son soo sor sos sot sr- srb src sre srf srh sri srn sro srr srs srt ss- ssb ssc sse ssf ssh ssi ssn sso ssr sss sst stb stc ste stf sth sti stn sto str sts stt tbb tbc tbe tbf tbh tbi tbn tbo tbr tbs tbt tcb tcc tce tcf tch tci tcn tco tcr tcs tct te- teb tec tee tef teh tei ten teo ter tes tet tfb tfc tfe tff tfh tfi tfn tfo tfr tfs tft th- thb thc the thf thh thi thn tho thr ths tht tib tic tie tif tih tii tin tio tir tis tit tnb tnc tne tnf tnh tni tnn tno tnr tns tnt to- tob toc toe tof toh toi ton too tor tos tot trb trc tre trf trh tri trn tro trr trs trt tsb tsc tse tsf tsh tsi tsn tso tsr tss tst ttb ttc tte ttf tth tti ttn tto ttr tts ttt