-er -th eee eef eer eet eex ef- efe eff efh efi efr eft efx ehe ehf ehh ehi ehr eht eie eif eii eir eit eix ere erf erh eri err ert ete etf eth eti etr ett etx ex- exe exh exi exr ext exx fee fef feh fei fer fet fex ffe fff ffh ffi ffr fft ffx fhe fhf fhh fhi fhr fie fif fih fii fir fit fix fre frf frh fri frr frt fte ftf fth fti ftr ftt ftx fxe fxi fxr fxt fxx h-i he- hee hef heh hei her het hex hfe hff hfh hfi hfr hft hhe hhf hhh hhi hhr hht hie hif hih hii hir hit hix hr- hre hrf hrh hri hrr hrt hte htf hth hti htr htt htx i-f ie- iee ief iei ier iet iex ife iff ifi ifr ift ifx ihe ihf ihh ihi ihr iht iie iif iih iii iir iit iix ir- ire irf iri irr irt irx ite itf ith iti itt itx ixe ixi re- ree ref reh rei rer ret rex rfe rff rfh rfi rfr rft rh- rhe rhf rhh rhi rhr rht rie rif rih rii rir rit rix rrf rrh rri rrr rrt rte rtf rti rtr rtt rtx rxr t-x te- tee tef teh tei ter tet tex tfe tff tfh tfi tfr tft tfx th- the thf thh thi thr tht thx tie tif tih tii tir tit tix tre trf trh tri trr trt trx tte ttf tth tti ttr ttt ttx txe txf txi txt xee xer xet xex xfe xfh xft xfx xht xie xii xit xix xrf xrt xrx xtf xti xtr xtx xxi xxx