cccc ccoc ccrc ccrt cctc cctt coco coct coot cor- corc coro corr cort cory cotc coto cott coty coyo coyr coyt crcc crcr croc croo cror crot croy crrt crtc cry- cryo ctor ctot ctrc cyc- cycc cyrt cyt- cyto cyy- cyyc occc occt ocro ocrr oct- octo octy oocr oooo oort oory ooty orco oro- oror orot oroy orro orry ortc orto oto- otoo otor otoy otro otry otto otyr rccc rctc rcyc rocc roco roor root rorc roro rort rory rotc roto rotr rott roty royt rrrr rtcc ryot rytt ryyt tccc tctc to-y toco toor toot torc toro torr tort tory totc toto totr tott toty toyo toyt trcc troc troo trot troy trtc trtr try- tryo ttoy tttt tyco tyr- tyro tyrr tyto tytt tyty yccc yctc yoot yoro yort yory yott yoyo yyyy