c-- ccc cch ccn cco ch- chc chh chn cho chy cn- cnc cnh cnn cno cny co- coc coh con coo coy cyc cyn cyo hcc hch hcn hco hcy hhc hhh hhn hho hhy hnc hnh hnn hno hny hoc hoh hon hoo hoy hy- hyc hyh hyn hyo hyy ncc nch ncn nco nhc nhh nhn nhy nnc nnh nnn nno no- noc noh non noo noy nyc nyn nyo nyy oc- occ och ocn oco ohc ohh ohn oho on- onc onh onn ono ony oo- ooc ooh oon ooo oyo ycc ych yco ycy yhc ynn yny yoc yon yoo yoy yyc yyy