ddd dde ddl ddn ddx de- ded dee del den dex dl- dld dle dll dlx dnd dne dnl dnn dxd dxl dxn dxx ed- edd ede edl edn edx eed eee eel een eex eld ele ell eln elx en- end ene enl enn ex- exd exe exl exx ldd lde ldl ldn led lee lel len lex lld lle lll lln lnd lne lnl lnn lxd lxx ndd nde ndl ndn ne- ned nee nel nen nex nld nle nll nln nlx nne nnl nnn nxd nxl xde xed xee xel xen xex xld xxl xxx