a-a a-i aaa aad aaf aai aao aar aax ad- ada add adf adi ado adr adx af- afa afd aff afi afo afr afx ai- aia aid aif aii aio air aix aoa aod aof aoi aoo aor aox ar- ara ard arf ari aro arr arx ax- axa axi axo axr axx daa dad daf dai dao dar dax dda ddd ddf ddi ddo ddr ddx dfa dfd dff dfi dfo dfr dfx di- dia did dif dii dio dir dix doa dod dof doi doo dor dox dra drd dri dro drr drx dxd dxi dxo dxr dxx faa fad faf fai fao far fax fda fdd fdf fdi fdo fdr fdx ffa ffd fff ffi ffo ffr ffx fia fid fif fii fir fix foa fof foi foo for fox fra frd frf fri fro frr fxi fxr fxx i-d i-f ia- iaa iad iaf iai iao iar ida idd idf idi ido idr idx ifa ifd iff ifi ifo ifr ifx iia iid iif iii iio iir iix io- ioa iod iof ioi ioo ior ir- ira ird irf iri iro irr irx ixi o-i oaa oad oaf oai oao oar oax oda odd odf odi odo odr of- ofa ofd off ofi ofo ofr ofx oia oid oif oii oio oir oo- ooa ood oof ooi ooo oor oox or- ora ord orf ori oro orr orx ox- oxa oxf oxi oxo oxx ra- raa rad raf rai rao rar rax rda rdd rdf rdi rdo rdr rdx rfa rfd rff rfi rfo rfr ria rid rif rii rio rir rix roa rod rof roi roo ror rox rra rrd rrf rri rrr rxr xaa xad xaf xar xda xdf xdi xdr xfa xfx xia xii xio xix xoa xod xof xoi xoo xor xox xrd xrf xrx xxi xxo xxx