tbbs tbcb tbcc tbce tbrb tbst tcbs tccc tcfc tcos tctc tcts tebo teco tecr tecs tect teec teef teer tees teet tefc teff teft teor teos ter- terc tere terf tero terr ters tesc tese teso tess test tete teto tetr tets tett tfeb tfec tfot tfrs tfss tftc tobe tobo tobs tobt toce toco toee toer toes toet toff tofo toft toof toor toos toot torc tore torf toro torr tors tort tosb tosc tose toso toss tost totc tote toto totr tots tott trcc tre- trec tree tref treo tres tret trfc trfr troc troe troo tros trot trst trtc trte trtr tsbc tscc tsec tses tset tsfc tsob tsos tsse tssf tssr tsst tstc tsts ttbb tteo tter ttfc ttff ttoe ttss tttt