stau stbc stbs stca stcc stcs stcu stia stib stic stig stis stit stsi stss sttc stub stuc stug stus stut suas suat sub- suba subb subg subi subs suc- succ suci sucs sug- suga sugg sugi suig suis suit sus- susa susi suss sust susu suta suti sutu suus taa- taag taas taat taba tabb tabc tabi tabs tabu taca tacc taci tacs tact taga tagg tagi tags tagu taia taig tais tait tasa tasb tasc tasi tass tast tasu tata tatb tati tats tatt tatu taua taub tauc taus taut tbas tbbs tbca tbcb tbcc tbgs tbit tbst tbta tcbs tcca tccc tccu tcga tctc tcts tgcc tgtc tgts tiaa tiab tias tiba tibi tibs tibu tica ticc tics tiga tigi tigs tiit tiiu tisa tisb tisi tiss tist tita titc titi tits titt titu tsaa tsai tsat tsau tsbc tsca tscc tscg tsgt tsia tsig tsis tssa tssg tssi tsst tstc tsts tsui ttab ttbb ttss tttt tuas tuat tuba tubb tubs tubu tuca tucc tuga tugg tugs tugu tuig tuis tuit tuiu tusa tusc tusi tuss tust tuta tuti tuts tutt tutu uabc uaca uasa uata uatu uaua ubac ubba ubbi ubic ubii ubis ubit ucai ucas ucat ucbc ucca ucci ucsa ucsb ucsc ucst ucsu ucua ucut ugab ugcc ugcg uggs uggt ugia ugis ugta uguu uica uist uits us-a usaa usac usag usas usat usba usbc usbs usca uscc uscg uscs usga usia usis ussa ussb ussc usss usst ussu usta ustb ustc usti usts usua usui usus utac utai utas utau utia utis utsa utsc utti uttu utug uusi uuta uuuu