sdc sdd sde sdi sdl sdm sdr sds sdt sdu se- seb sec sed see sei sel sem ser ses set seu sib sic sid sie sii sil sim sir sis sit siu slb slc sld sle sli sll slm slr sls slt slu smb smc smd sme smi sml smm smr sms smt smu sr- srb src srd sre sri srl srm srr srs srt ss- ssb ssc ssd sse ssi ssl ssm ssr sss sst ssu stb stc std ste sti stl stm str sts stt stu sub suc sud sue sui sul sum sur sus sut suu tbb tbc tbd tbe tbi tbl tbm tbr tbs tbt tbu tcb tcc tcd tce tci tcl tcm tcr tcs tct tcu tdb tdc tdd tde tdi tdl tdm tdr tds tdt tdu te- teb tec ted tee tei tel tem ter tes tet teu tib tic tid tie tii til tim tir tis tit tiu tlc tld tle tli tll tlm tlr tls tlt tlu tmb tmc tmd tme tmi tml tmm tmr tms tmt tmu trb trc trd tre tri trl trm trr trs trt tru tsb tsc tsd tse tsi tsl tsm tsr tss tst tsu ttb ttc ttd tte tti ttl ttm ttr tts ttt ttu tub tuc tud tue tui tul tum tur tus tut tuu ubb ubc ube ubi ubl ubr ubs ubt ubu ucb ucc ucd uce uci ucl ucm ucr ucs uct ucu udb udc udd ude udi udl udm udr uds udt udu ueb uec ued uee uei uel uem uer ues uet uib uic uid uie uii uil uim uir uis uit uiu ulb ulc uld ule uli ull ulm ulr uls ult ulu um- umb umc umd ume umi uml umm umr ums umt umu ur- urb urc urd ure uri url urm urr urs urt uru usb usc usd use usi usl usm usr uss ust usu utb utc utd ute uti utl utm utr uts utt utu uuc uue uum uur uus uut uuu