snte sntr spde spdp spdr spdt sped spee spen sper spes spet spie spin spip spir spis spit spne spns sppd spps sprd spri sprs spsd spse spsp spss spst sptr spts srde sres sris srni srnn srps srpt srsd srsp srtp srtr ssdd ssdp ssee ssep sses sset ssid ssin ssis ssit ssns sspe ssps sspt ssri ssrs sssi ssss sstd sstp ssts stds sted stee sten step ster stes stet stid stie stip stir stis stit stnd stnn stnr stns stpd stpp stps strd stre stri strn strs stsi stss sttd sttr tdes tdis tdri tdse tdss tedd tede tedi teds teed teen teer tees teet teie tein teip teir teis tend tene teni tenn tenp tens tent tepe tepi tepp ter- tere teri tern terp terr ters tesd tese tesp tess test tete teti tetr tets tett tidd tide tids tie- tied tiee tiei tien tiep tier ties tiet tiit tind tine tini tinn tins tint tip- tipe tipi tipp tips tipt tird tire tiri tirr tirs tise tisi tiss tist tite titi titp tits titt tndd tnes tnsp tnts tped tper tpir tppd tppp tppr tprs tpte tptp tptr tre- tred tree trei tren tres tret tri- trie trin trip tris trit trpe trpn trpp trps trsd trsi trst trte trtr tsen tses tset tsid tsin tsis tspn tsps tspt tsse tssi tssr tsst tsts tten tter ttss tttt