sdr sds sdt sdu se- sec sed see sei sem sen sep ser ses set seu sic sid sie sii sim sin sip sir sis sit siu smc smd sme smi smm smn smp smr sms smt smu snc snd sne sni snm snn snp snr sns snt snu spc spd spe spi spm spn spp spr sps spt spu sr- src srd sre sri srm srn srp srr srs srt ss- ssc ssd sse ssi ssm ssn ssp ssr sss sst ssu stc std ste sti stm stn stp str sts stt stu suc sud sue sui sum sun sup sur sus sut suu tcc tcd tce tci tcm tcn tcp tcr tcs tct tcu tdc tdd tde tdi tdm tdn tdp tdr tds tdt tdu te- tec ted tee tei tem ten tep ter tes tet teu tic tid tie tii tim tin tip tir tis tit tiu tmc tmd tme tmi tmm tmn tmp tmr tms tmt tmu tnc tnd tne tni tnm tnn tnp tnr tns tnt tpc tpd tpe tpi tpm tpn tpp tpr tps tpt tpu trc trd tre tri trm trn trp trr trs trt tru tsc tsd tse tsi tsm tsn tsp tsr tss tst tsu ttc ttd tte tti ttm ttn ttp ttr tts ttt ttu tuc tud tue tui tum tun tup tur tus tut tuu ucc ucd uce uci ucm ucn ucp ucr ucs uct ucu udc udd ude udi udm udn udp udr uds udt udu uec ued uee uei uem uen uep uer ues uet uic uid uie uii uim uin uip uir uis uit uiu um- umc umd ume umi umm umn ump umr ums umt umu un- unc und une uni unm unn unp unr uns unt unu up- upc upd upe upi upm upn upp upr ups upt upu ur- urc urd ure uri urm urn urp urr urs urt uru usc usd use usi usm usn usp usr uss ust usu utc utd ute uti utm utn utp utr uts utt utu uuc uue uum uun uur uus uut uuu