roon roor root rorc rore rori roro rort rotc rote roti rotn roto rotr rott rrrr rtcc rtce rtee rtei tbcb tbcc tbce tbit tbrb tccc tcnn tcon tctc tebo teco tecr tect teec teen teer teet teic teie tein teir tenb tenc tene teni tenn teno tent teon teor ter- terc tere teri tern tero terr tete teti teto tetr tett tibi ticc tice tico tie- tiee tiei tien tieo tier tiet tiit tinc tine tini tinn tino tint tion tirb tire tiri tiro tirr titc tite titi tito titt tnbc tncc tneb tobe tobi tobo tobt toce toci toco toee toei toen toer toet toie toit tonb tone toni tonn tono toon toor toot torc tore tori torn toro torr tort totc tote toti toto totr tott trcc tre- trec tree trei tren treo tret tri- trib tric trie trin trio trit trno troc troe troi tron troo trot trtc trte trtr ttbb ttcn tten tteo tter ttoe tton tttt