cccc cchy ccoc cctc cctt chch choc choh choo choy chto chtt chy- chyc coch coco coct coho cooh coot cotc coth coto cott coty coyo coyt ctot cyc- cycc cyt- cyto cyy- cyyc hccc hcch hhhh hoch hoho hoot hoth hoto hott hoyt htcc htoh hyo- occc occt ocht oct- octo octy ohcc ohho ohoh ohto ohyo ooho oooh oooo ooty otho oto- otoh otoo otoy otto oych tccc tch- tchh tcho tctc thch thoo thot thyh to-y toch toco toho tooh toot totc toth toto tott toty toyo toyt ttoy tttt tyco tyht tyto tytt tyty yccc ycch yctc yoch yoho yoot yott yoyo ytch ytht yyyy