slc sle slf sll slm sln slo slr sls slt slu smc sme smf sml smm smn smo smr sms smt smu snc sne snf snl snm snn sno snr sns snt snu soc soe sof sol som son soo sor sos sot sou sr- src sre srf srl srm srn sro srr srs srt ss- ssc sse ssf ssl ssm ssn sso ssr sss sst ssu stc ste stf stl stm stn sto str sts stt stu suc sue suf sul sum sun suo sur sus sut suu tcc tce tcf tcl tcm tcn tco tcr tcs tct tcu te- tec tee tef tel tem ten teo ter tes tet teu tfc tfe tff tfl tfm tfn tfo tfr tfs tft tfu tlc tle tlf tll tlm tln tlo tlr tls tlt tlu tmc tme tmf tml tmm tmn tmo tmr tms tmt tmu tnc tne tnf tnl tnm tnn tno tnr tns tnt to- toc toe tof tol tom ton too tor tos tot tou trc tre trf trl trm trn tro trr trs trt tru tsc tse tsf tsl tsm tsn tso tsr tss tst tsu ttc tte ttf ttl ttm ttn tto ttr tts ttt ttu tuc tue tuf tul tum tun tuo tur tus tut tuu ucc uce ucf ucl ucm ucn uco ucr ucs uct ucu uec uee uef uel uem uen uer ues uet ufc ufe uff ufl ufm ufn ufo ufr ufs uft ufu ulc ule ulf ull ulm uln ulo ulr uls ult ulu um- umc ume umf uml umm umn umo umr ums umt umu un- unc une unf unl unm unn uno unr uns unt unu uoc uoe uol uom uon uoo uor uos uot ur- urc ure urf url urm urn uro urr urs urt uru usc use usf usl usm usn uso usr uss ust usu utc ute utf utl utm utn uto utr uts utt utu uuc uue uum uun uur uus uut uuu