rsg rsh rsi rsk rsn rsr rss rst rtc rte rtf rtg rti rtk rtn rtr rts rtt scc sce scf scg sch sci sck scn scr scs sct se- sec see sef seg seh sei sek sen ser ses set sfc sfe sff sfg sfh sfi sfk sfn sfr sfs sft sgc sge sgf sgg sgh sgi sgk sgn sgr sgs sgt sh- shc she shf shg shh shi shk shn shr shs sht sic sie sif sig sih sii sik sin sir sis sit sk- skc ske skf skg skh ski skk skr sks skt snc sne snf sng sni snk snn snr sns snt sr- src sre srf srg srh sri srk srn srr srs srt ss- ssc sse ssf ssg ssh ssi ssk ssn ssr sss sst stc ste stf stg sth sti stk stn str sts stt tcc tce tcf tcg tch tci tck tcn tcr tcs tct te- tec tee tef teg teh tei tek ten ter tes tet tfc tfe tff tfg tfh tfi tfk tfn tfr tfs tft tgc tge tgf tgg tgh tgi tgk tgn tgr tgs tgt th- thc the thf thg thh thi thk thn thr ths tht tic tie tif tig tih tii tik tin tir tis tit tkc tke tkg tkk tkr tks tkt tnc tne tnf tng tnh tni tnk tnn tnr tns tnt trc tre trf trg trh tri trk trn trr trs trt tsc tse tsf tsg tsh tsi tsk tsn tsr tss tst ttc tte ttf ttg tth tti ttk ttn ttr tts ttt