cccc cchr ccoc ccrc ccrt cctc cctt chch choc choh choo chor chrc chro chrr chrt chto chtr chtt coch coco coct coho cooh coot cor- corc coro corr cort cotc coth coto cott crcc crcr croc croh croo cror crot crrt crtc ctor ctot ctrc hccc hcch hhhh hoch hocr hoho hoor hoot horc horo horr hort hoth hoto hotr hott hrrc htcc htoh httr occc occt ocht ocro ocrr oct- octo ohcc ohho ohoh ohto oocr ooho oooh oooo oort orch orco oro- oror orot orro ortc orth orto otho othr oto- otoh otoo otor otro otto rccc rctc rhoc rhoh rocc roch roco rohr roor root rorc roro rort rotc roth roto rotr rott rrrr rtcc tccc tch- tchh tcho tchr tctc thch thoo thor thot thro thtr toch toco toho tooh toor toot torc toro torr tort totc toth toto totr tott trcc troc troo trot trtc trtr tttt