-th hhh hho hhp hhs hht hoh hoo hop hos hot hph hpo hpp hps hpt hsh hsp hss hst hth hto htp hts htt ohh oho ohp ohs oht oo- ooh ooo oop oos oot op- oph opo opp ops opt os- osh oso osp oss ost ot- oth oto otp ots ott p-p pho php phs pht poh poo pop pos pot pph ppo ppp pps ppt ps- psh pso psp pss pst pt- pth pto ptp pts ptt sh- shh sho shp shs sht soh soo sop sos sot sph spo spp sps spt ss- ssh sso ssp sss sst sth sto stp sts stt th- thh tho thp ths tht to- toh too top tos tot tph tpo tpp tps tpt tsh tso tsp tss tst tth tto ttp tts ttt