fff ffh ffi ffo ffp ffs ffx fhf fhh fhi fho fhp fhs fif fih fii fip fis fix fof foh foi foo fop fos fox fph fpi fpo fpp fps fpx fsf fsh fsi fso fsp fss fsx fxi fxp fxs fxx h-i hff hfh hfi hfo hfp hfs hhf hhh hhi hho hhp hhs hif hih hii hio hip his hix hof hoh hoi hoo hop hos hox hpf hph hpi hpo hpp hps hsf hsh hsi hsp hss hsx i-f iff ifi ifo ifp ifs ifx ihf ihh ihi iho ihp ihs iif iih iii iio iip iis iix io- iof ioh ioi ioo iop ios ipf ipi ipo ipp ips ipx is- isf ish isi iso isp iss ixi o-i of- off ofi ofo ofp ofs ofx ohf ohh ohi oho ohp ohs oif oii oio oip ois oo- oof ooh ooi ooo oop oos oox op- opf oph opi opo opp ops opx os- osf osh osi oso osp oss osx ox- oxf oxi oxo oxx p-p pff pfi pfo pfp pfs pfx phf phi pho php phs phx pif pih pii pio pip pis pix pof poh poi poo pop pos pox ppf pph ppi ppo ppp pps ppx ps- psf psh psi pso psp pss psx pxs sff sfh sfi sfo sfp sfs sfx sh- shf shh shi sho shp shs sif sih sii sio sip sis six sof soh soi soo sop sos sox spf sph spi spo spp sps spx ss- ssf ssh ssi sso ssp sss ssx sxi sxs xfh xfs xfx xhp xii xio xis xix xof xoi xoo xop xos xox xpf xpo xpp xps xsi xsp xss xxi xxo xxp xxx