roor root rorc rori roro rort rotc rotg roth roti rotl rotn roto rotr rott rrrr rtcc rtcg rtlt tccc tch- tchh tchi tcho tchr tcnn tcon tctc tgcc tgtc thch thi- thic thig thil thin thio thir thnt thog thon thoo thor thot thri thro thtr ticc tich tico tigh tigi tigr tiht tiit tilh till tiln tilo tilr tilt tinc ting tini tinn tino tint tion tiri tirl tiro tirr titc tith titi tito titt tlco tlgc tlli tlon tncc toch toci toco togh togo togr togt tohi toho toil toit tol- toli toll tolo tolt tong tonh toni tonn tono tooh tool toon toor toot torc torg tori torn toro torr tort totc toth toti toto totr tott trcc trcl tri- tric trig tril trin trio trit trng trno troc trog troi tron troo trot trtc trtr ttcn tton tttt