-th h-i hhh hhi hho hhp hht hih hii hio hip hit hix hoh hoi hoo hop hot hox hph hpi hpo hpp hpt hth hti hto htp htt htx ihh ihi iho ihp iht iih iii iio iip iit iix io- ioh ioi ioo iop iot ipi ipo ipp ipt ipx ith iti ito itp itt itx ixi o-i ohh ohi oho ohp oht oii oio oip oit oo- ooh ooi ooo oop oot oox op- oph opi opo opp opt opx ot- oth oti oto otp ott ox- oxi oxo oxt oxx p-p phi pho php pht phx pih pii pio pip pit pix poh poi poo pop pot pox pph ppi ppo ppp ppt ppx pt- pth pti pto ptp ptt ptx pxt t-x th- thh thi tho thp tht thx tih tii tio tip tit tix to- toh toi too top tot tox tph tpi tpo tpp tpt tpx tth tti tto ttp ttt ttx txi txt xhp xht xii xio xit xix xoi xoo xop xot xox xpo xpp xpt xti xtp xtx xxi xxo xxp xxx