ddd ddf ddi ddm ddo ddr ddx dfd dff dfi dfm dfo dfr dfx di- did dif dii dim dio dir dix dmd dmf dmi dmm dmo dmr dmx dod dof doi dom doo dor dox drd dri drm dro drr drx dxd dxi dxo dxr dxx fdd fdf fdi fdm fdo fdr fdx ffd fff ffi ffm ffo ffr ffx fid fif fii fim fir fix fmd fmf fmi fmm fmo fmr fmx fof foi fom foo for fox frd frf fri frm fro frr fxi fxm fxr fxx i-d i-f idd idf idi idm ido idr idx ifd iff ifi ifm ifo ifr ifx iid iif iii iim iio iir iix im- imd imf imi imm imo imx io- iod iof ioi iom ioo ior ir- ird irf iri irm iro irr irx ixi m-f m-o m-r mdd mdf mdi mdm mdo mdr mdx mfd mff mfi mfm mfo mfr mi- mid mif mii mim mio mir mix mmd mmf mmi mmm mmo mmr mmx mod mof moi mom moo mor mox mrd mrf mri mrm mro mrr mrx mxd mxi mxr o-i odd odf odi odm odo odr of- ofd off ofi ofm ofo ofr ofx oid oif oii oim oio oir om- omd omf omi omm omo omr omx oo- ood oof ooi oom ooo oor oox or- ord orf ori orm oro orr orx ox- oxf oxi oxo oxx rdd rdf rdi rdm rdo rdr rdx rfd rff rfi rfm rfo rfr rid rif rii rim rio rir rix rmd rmf rmi rmm rmo rmr rmx rod rof roi rom roo ror rox rrd rrf rri rrm rrr rxr xdf xdi xdm xdr xfm xfx xii xio xix xmd xmf xmi xmm xmo xmr xmx xod xof xoi xom xoo xor xox xrd xrf xrx xxi xxo xxx