spri sprs spsa spsp spss spst spta sptc sptr spts sras srcc srct sris srpc srps srpt srsp srta srtp srtr ssaa ssac ssap ssas ssat ssca sscc ssci sscp sscs ssis ssit sspa sspc ssps sspt ssra ssrc ssri ssrs sssa sssc sssi ssss ssta sstc sstp ssts stac stai stap star stas stat stca stcc stcp stcs stia stic stip stir stis stit stpp stps stra strc stri strs stsi stss sttc sttr taa- taar taas taat taca tacc taci tacs tact taia taip tair tais tait tapa tapi tapp tapr taps tapt tara tarc tari tarp tarr tars tart tasa tasc tasi tasp tasr tass tast tata tati tatr tats tatt tcap tcca tccc tcpa tctc tcts tiaa tiar tias tica ticc tics tiit tip- tipa tipc tipi tipp tips tipt tira tiri tirr tirs tisa tisi tiss tist tita titc titi titp tits titt tpac tpap tpcp tpcs tpia tpir tppa tppp tppr tprs tpsa tpsc tptp tptr traa trac trai trap tras trat trca trcc tri- tria tric trip tris trit trpa trpc trpp trps trra trsi trst trtc trtr tsaa tsai tsar tsat tsca tscc tscp tsia tsis tsps tspt tssa tssi tssr tsst tstc tsts ttcp ttss tttt