cccc cccu ccoc cctc cctt ccuc ccut coco coct cocu coot cotc coto cott cotu coty cout couy coyo coyt ctot cucc cut- cutc cuto cutt cuy- cuyo cyc- cycc cyt- cyto cyy- cyyc occc occt oct- octo octy oooo ooty oto- otoo otoy otto ottu oucc out- outo outy ouu- oyou tccc tccu tctc to-y toco toot totc toto tott toty tout toyo toyt ttoy tttt tucc tuco tuto tutt tutu tuty tuuo tyco tyto tytt tyty ucut uocc utoy utto uttu uuoc uuuu yccc yctc yoot yott yout yoyo yuto yutu yuty yuyu yyyy