-er -th eee eep eer eet eex ehe ehh ehi ehp ehr eht eie eii eip eir eit eix ep- epe eph epi epp epr ept epx ere erh eri erp err ert ete eth eti etp etr ett etx ex- exe exh exi exp exr ext exx h-i he- hee heh hei hep her het hex hhe hhh hhi hhp hhr hht hie hih hii hip hir hit hix hpe hph hpi hpp hpr hpt hr- hre hrh hri hrp hrr hrt hte hth hti htp htr htt htx ie- iee iei iep ier iet iex ihe ihh ihi ihp ihr iht iie iih iii iip iir iit iix ipe ipi ipp ipr ipt ipx ir- ire iri irp irr irt irx ite ith iti itp itt itx ixe ixi p-p pee peh pei pep per pet pex phe phi php phr pht phx pie pih pii pip pir pit pix ppe pph ppi ppp ppr ppt ppx pre prh pri prp prr prt prx pt- pte pth pti ptp ptr ptt ptx pxe pxr pxt re- ree reh rei rep rer ret rex rh- rhe rhh rhi rhp rhr rht rie rih rii rip rir rit rix rpe rph rpi rpp rpr rpt rpx rrh rri rrp rrr rrt rte rti rtp rtr rtt rtx rxp rxr t-x te- tee teh tei tep ter tet tex th- the thh thi thp thr tht thx tie tih tii tip tir tit tix tpe tph tpi tpp tpr tpt tpx tre trh tri trp trr trt trx tte tth tti ttp ttr ttt ttx txe txi txt xee xep xer xet xex xhp xht xie xii xit xix xpe xpp xpt xrt xrx xti xtp xtr xtx xxi xxp xxx