-th hhh hho hhp hht hhy hoh hoo hop hot hoy hph hpo hpp hpt hpy hth hto htp htt hty hy- hyh hyo hyp hyt hyy ohh oho ohp oht oo- ooh ooo oop oot op- oph opo opp opt opy ot- oth oto otp ott oyo p-p pho php pht phy poh poo pop pot poy pph ppo ppp ppt pt- pth pto ptp ptt pty py- pyo pyt th- thh tho thp tht thy to- toh too top tot toy tph tpo tpp tpt tth tto ttp ttt tty tyo typ tyt yht yoo yop yot yoy ypo yth yto ytp ytt yyt yyy