strc stri stro strs stsf stsi stss sttc sttr tccc tcfc tcos tctc tcts tfot tfrs tfsi tfss tftc ticc tico tics tiff tifo tift tiit till tilo tilr tils tilt tios tiri tirl tiro tirr tirs tisi tiso tiss tist titc titi tito tits titt tlco tlli tlos tlrs toci toco toff tofi tofo toft toil tois toit tol- toli toll tolo tolt toof tool toor toos toot torc torf tori toro torr tors tort tosc tosi toso toss tost totc toti toto totr tots tott trcc trcl trfc trfr tri- tric trif tril trio tris trit troc troi troo tros trot trsi trst trtc trtr tscc tsfc tsfl tsis tsoi tsol tsos tssf tssi tssr tsst tstc tsts ttfc ttff ttss tttt