-th hhh hhp hhr hhs hht hph hpp hpr hps hpt hr- hrh hrp hrr hrs hrt hsh hsp hsr hss hst hth htp htr hts htt p-p php phr phs pht pph ppp ppr pps ppt prh prp prr prs prt ps- psh psp psr pss pst pt- pth ptp ptr pts ptt rh- rhh rhp rhr rhs rht rph rpp rpr rps rpt rrh rrp rrr rrs rrt rsh rsp rsr rss rst rtp rtr rts rtt sh- shh shp shr shs sht sph spp spr sps spt sr- srh srp srr srs srt ss- ssh ssp ssr sss sst sth stp str sts stt th- thh thp thr ths tht tph tpp tpr tps tpt trh trp trr trs trt tsh tsp tsr tss tst tth ttp ttr tts ttt