-er -th eee eeo eer eet eex ehe ehh ehi eho ehr eht eie eii eio eir eit eix eo- eoe eoh eoi eoo eor eot ere erh eri ero err ert ete eth eti eto etr ett etx ex- exe exh exi exo exr ext exx h-i he- hee heh hei heo her het hex hhe hhh hhi hho hhr hht hie hih hii hio hir hit hix hoe hoh hoi hoo hor hot hox hr- hre hrh hri hro hrr hrt hte hth hti hto htr htt htx ie- iee iei ier iet iex ihe ihh ihi iho ihr iht iie iih iii iio iir iit iix io- ioe ioh ioi ioo ior iot ir- ire iri iro irr irt irx ite ith iti ito itt itx ixe ixi o-i oee oeh oei oeo oer oet oex ohe ohh ohi oho ohr oht oie oii oio oir oit oo- ooh ooi ooo oor oot oox or- ore orh ori oro orr ort orx ot- ote oth oti oto otr ott ox- oxi oxo oxt oxx re- ree reh rei reo rer ret rex rh- rhe rhh rhi rho rhr rht rie rih rii rio rir rit rix roe roh roi roo ror rot rox rrh rri rrr rrt rte rti rto rtr rtt rtx rxr t-x te- tee teh tei teo ter tet tex th- the thh thi tho thr tht thx tie tih tii tio tir tit tix to- toe toh toi too tor tot tox tre trh tri tro trr trt trx tte tth tti tto ttr ttt ttx txe txi txt xee xer xet xex xht xie xii xio xit xix xoi xoo xor xot xox xrt xrx xti xtr xtx xxi xxo xxx