rti rtj rto rtp rtr rts rtt scc sce scf sch sci scj sco scp scr scs sct se- sec see sef seh sei sej seo sep ser ses set sfc sfe sff sfh sfi sfj sfo sfp sfr sfs sft sh- shc she shf shh shi sho shp shr shs sht sic sie sif sih sii sij sio sip sir sis sit sjc sje sjf sjh sji sjj sjp sjr sjs sjt soc soe sof soh soi soj soo sop sor sos sot spc spe spf sph spi spo spp spr sps spt sr- src sre srf srh sri srj sro srp srr srs srt ss- ssc sse ssf ssh ssi ssj sso ssp ssr sss sst stc ste stf sth sti stj sto stp str sts stt tcc tce tcf tch tci tcj tco tcp tcr tcs tct te- tec tee tef teh tei tej teo tep ter tes tet tfc tfe tff tfh tfi tfj tfo tfp tfr tfs tft th- thc the thf thh thi tho thp thr ths tht tic tie tif tih tii tio tip tir tis tit tjc tje tjf tji tjo tjp tjr tjs to- toc toe tof toh toi toj too top tor tos tot tpc tpe tpf tph tpi tpj tpo tpp tpr tps tpt trc tre trf trh tri tro trp trr trs trt tsc tse tsf tsh tsi tsj tso tsp tsr tss tst ttc tte ttf tth tti tto ttp ttr tts ttt