-th fff ffh ffi ffo ffr ffs fft ffx fhf fhh fhi fho fhr fhs fif fih fii fir fis fit fix fof foh foi foo for fos fot fox frf frh fri fro frr frs frt fsf fsh fsi fso fsr fss fst fsx ftf fth fti fto ftr fts ftt ftx fxi fxr fxs fxt fxx h-i hff hfh hfi hfo hfr hfs hft hhf hhh hhi hho hhr hhs hht hif hih hii hio hir his hit hix hof hoh hoi hoo hor hos hot hox hr- hrf hrh hri hro hrr hrs hrt hsf hsh hsi hsr hss hst hsx htf hth hti hto htr hts htt htx i-f iff ifi ifo ifr ifs ift ifx ihf ihh ihi iho ihr ihs iht iif iih iii iio iir iis iit iix io- iof ioh ioi ioo ior ios iot ir- irf iri iro irr irs irt irx is- isf ish isi iso isr iss ist itf ith iti ito its itt itx ixi o-i of- off ofi ofo ofr ofs oft ofx ohf ohh ohi oho ohr ohs oht oif oii oio oir ois oit oo- oof ooh ooi ooo oor oos oot oox or- orf orh ori oro orr ors ort orx os- osf osh osi oso osr oss ost osx ot- otf oth oti oto otr ots ott ox- oxf oxi oxo oxt oxx rff rfh rfi rfo rfr rfs rft rh- rhf rhh rhi rho rhr rhs rht rif rih rii rio rir ris rit rix rof roh roi roo ror ros rot rox rrf rrh rri rrr rrs rrt rsf rsh rsi rso rsr rss rst rsx rtf rti rto rtr rts rtt rtx rxr rxs sff sfh sfi sfo sfr sfs sft sfx sh- shf shh shi sho shr shs sht sif sih sii sio sir sis sit six sof soh soi soo sor sos sot sox sr- srf srh sri sro srr srs srt srx ss- ssf ssh ssi sso ssr sss sst ssx stf sth sti sto str sts stt stx sxi sxs sxt t-x tff tfh tfi tfo tfr tfs tft tfx th- thf thh thi tho thr ths tht thx tif tih tii tio tir tis tit tix to- tof toh toi too tor tos tot tox trf trh tri tro trr trs trt trx tsf tsh tsi tso tsr tss tst tsx ttf tth tti tto ttr tts ttt ttx txf txi txs txt xfh xfs xft xfx xht xii xio xis xit xix xof xoi xoo xor xos xot xox xrf xrt xrx xsi xss xst xtf xti xtr xts xtx xxi xxo xxx