skss sl-i sleb slee sler sles slet slib slie slik slir slit slre slrs slst slts sreb sres srib sris srtr ssbr ssee sses sset ssis ssit ssle sslt ssri ssrl ssrs sssb sssi ssss sstb sstl ssts stbs stee stek stel ster stes stet stib stie stik stil stir stis stit stks stle stlt stre stri strk strs stsi stss sttr tbbs tbil tbit tbrb tbst teek teel teer tees teet teie teil teir teis teke tel- tele teli tell tels telt ter- tere teri terk terr ters tese tesl tess test tete teti tetr tets tett tibi tibs tie- tiee tiei tiel tier ties tiet tiit tike tiki tile till tilr tils tilt tirb tire tiri tirl tirr tirs tisb tise tisi tiss tist tite titi tits titt tkts tlik tlli tlrs tre- tree trei trek tres tret tri- trib trie trik tril tris trit trsi trst trte trtr tses tset tsis tsks tsse tssi tssr tsst tsts ttbb tter ttss tttt