ddd dde ddf ddl ddp ddx de- ded dee def del dep dex dfd dfe dff dfl dfp dfx dl- dld dle dlf dll dlp dlx dpd dpe dpf dpl dpp dxd dxl dxp dxx ed- edd ede edf edl edp edx eed eee eef eel eep eex ef- efd efe eff efl efp efx eld ele elf ell elp elx ep- epd epe epf epl epp epx ex- exd exe exl exp exx fdd fde fdf fdl fdp fdx fed fee fef fel fep fex ffd ffe fff ffl ffp ffx fld fle flf fll flp flx fpd fpe fpl fpp fpx fxe fxp fxx l-p ldd lde ldf ldl ldp led lee lef lel lep lex lfd lfe lff lfl lfp lfx lld lle llf lll llp lpd lpe lpf lpl lpp lpx lxd lxx p-p pdd pde pdf pdl pdp pdx ped pee pef pel pep pex pfd pfe pff pfl pfp pfx pld ple plf pll plp plx ppd ppe ppf ppl ppp ppx pxe pxl xde xdf xed xee xel xep xex xfe xfl xfx xld xlf xpd xpe xpf xpl xpp xxl xxp xxx