sec sed see seh sei sen ser ses set seu sh- shb shc shd she shh shi shn shr shs sht shu sib sic sid sie sih sii sin sir sis sit siu snb snc snd sne sni snn snr sns snt snu sr- srb src srd sre srh sri srn srr srs srt ss- ssb ssc ssd sse ssh ssi ssn ssr sss sst ssu stb stc std ste sth sti stn str sts stt stu sub suc sud sue suh sui sun sur sus sut suu tbb tbc tbd tbe tbh tbi tbn tbr tbs tbt tbu tcb tcc tcd tce tch tci tcn tcr tcs tct tcu tdb tdc tdd tde tdh tdi tdn tdr tds tdt tdu te- teb tec ted tee teh tei ten ter tes tet teu th- thb thc thd the thh thi thn thr ths tht thu tib tic tid tie tih tii tin tir tis tit tiu tnb tnc tnd tne tnh tni tnn tnr tns tnt trb trc trd tre trh tri trn trr trs trt tru tsb tsc tsd tse tsh tsi tsn tsr tss tst tsu ttb ttc ttd tte tth tti ttn ttr tts ttt ttu tub tuc tud tue tuh tui tun tur tus tut tuu ubb ubc ube ubh ubi ubn ubr ubs ubt ubu ucb ucc ucd uce uch uci ucn ucr ucs uct ucu udb udc udd ude udi udn udr uds udt udu ueb uec ued uee ueh uei uen uer ues uet uhb uhc uhd uhe uhh uhi uhr uhs uht uhu uib uic uid uie uii uin uir uis uit uiu un- unb unc und une unh uni unn unr uns unt unu ur- urb urc urd ure uri urn urr urs urt uru usb usc usd use ush usi usn usr uss ust usu utb utc utd ute uth uti utn utr uts utt utu uuc uue uun uur uus uut uuu