cccc ccci cccu ccic ccii ccoc cctc cctt ccuc ccut cicc cici cico cict cicu ciii ciit citi cito citt citu city ciuc ciyu coco coct cocu coit coot cotc coti coto cott cotu coty cout couy coyo coyt ctic ctot cucc cuci cui- cuit cut- cutc cuto cutt cuy- cuyo cyc- cycc cyt- cyto cyy- cyyc iccc icci icco icct iccu icoc iiii iiio iiit iioi iioo iitt iiuc ioci ioii ioio ioit iooi iooo ioto itic itoi itoo itou itto itty iucc iuiu iuty occc occi occt oct- octi octo octy oici oiii oitc oiti oooo ooty otic otit oto- otoo otoy otti otto ottu oucc ouii ouit out- outi outo outy ouu- oyou tccc tccu tctc ticc tico tiit tiiu tiou titc titi tito titt titu tiyi tiyo to-y toci toco toit toot totc toti toto tott toty toui tout toyo toyt ttoy tttt tucc tuco tuit tuiu tuti tuto tutt tutu tuty tuuo tyco tyti tyto tytt tyty ucci ucio ucut uocc utoy utti utto uttu uuoc uuuu yccc yctc yiti yoit yoot yott youi yout yoyo yuit yuto yutu yuty yuyu yyyy