sers sert sesa sesc sese sess sest set- seta setc sete setl sets sett slaa slac slad slae slap slas slat slcc slcd slds slea sled slee slep sler sles slet sllp slpp slps slrc slre slrp slrs slsa slsc slst slts sp-a spac spad spae spal spap spar spas spat spca spcc spcs spdc spde spdl spdp spdr spdt spea spec sped spee spel sper spes spet spla splc sple splp splr spls sppd spps sprd sprs spsa spsd spse spsp spss spst spta sptc sptr spts sras srcc srct srde srec sres srpc srps srpt srsd srsp srta srtp srtr ssaa ssac ssap ssas ssat ssca sscc ssce sscp sscs ssdc ssdd ssdp ssec ssee ssep sses sset ssla sslc ssle sslp sslt sspa sspc sspe sspl ssps sspt ssra ssrc ssrl ssrs sssa sssc ssss ssta sstc sstd sstl sstp ssts stac stad stae stal stap star stas stat stca stcc stcp stcs stds stea stec sted stee stel step ster stes stet stlc stld stle stlt stpd stpp stps stra strc strd stre strs stss sttc sttd sttr taa- taal taar taas taat taca tacc tace tacl tacs tact tada tade tads taec tael taer taes tala talc tale tall tals tapa tape tapp tapr taps tapt tara tarc tard tare tarp tarr tars tart tasa tasc tase tasp tasr tass tast tata tate tatr tats tatt tcad tcap tcca tccc tcdd tcep tcpa tctc tcts tdac tdal tdap tdes tdls tdra tdse tdss teac tead teal tear teas teat teca tecl tecr tecs tect teda tedd tede teds teec teed teel teer tees teet tel- tela telc teld tele tell tels telt tepa tepe tepp ter- tera terc tere terp terr ters tesa tesc tesd tese tesl tesp tess test teta tete tetr tets tett tlac tldp tldr tlpa tlrs tpac tpap tpcd tpcp tpcs tped tper tpld tpls tppa tppd tppp tppr tprs tpsa tpsc tpte tptp tptr traa trac trad trae tral trap tras trat trca trcc trcl tre- trea trec tred tree tres tret trpa trpc trpe trpp trps trra trsd trst trtc trte trtr tsaa tsal tsar tsat tsca tscc tscp tsec tses tset tsps tspt tssa tsse tssr tsst tstc tsts ttcp tter ttss tttt