ddd dde ddl ddp ddx de- ded dee del dep dex dl- dld dle dll dlp dlx dpd dpe dpl dpp dxd dxl dxp dxx ed- edd ede edl edp edx eed eee eel eep eex eld ele ell elp elx ep- epd epe epl epp epx ex- exd exe exl exp exx l-p ldd lde ldl ldp led lee lel lep lex lld lle lll llp lpd lpe lpl lpp lpx lxd lxx p-p pdd pde pdl pdp pdx ped pee pel pep pex pld ple pll plp plx ppd ppe ppl ppp ppx pxe pxl xde xed xee xel xep xex xld xpd xpe xpl xpp xxl xxp xxx