-er ddd dde ddl ddp ddr ddx de- ded dee del dep der dex dl- dld dle dll dlp dlr dlx dpd dpe dpl dpp dpr drd dre drl drp drr drx dxd dxl dxp dxr dxx ed- edd ede edl edp edr edx eed eee eel eep eer eex eld ele ell elp elr elx ep- epd epe epl epp epr epx erd ere erl erp err ex- exd exe exl exp exr exx l-p ldd lde ldl ldp ldr led lee lel lep ler lex lld lle lll llp llr lpd lpe lpl lpp lpr lpx lrd lrp lrr lxd lxr lxx p-p pdd pde pdl pdp pdr pdx ped pee pel pep per pex pld ple pll plp plr plx ppd ppe ppl ppp ppr ppx prd pre prl prp prr prx pxe pxl pxr rdd rde rdl rdp rdr rdx re- red ree rel rep rer rex rld rle rll rlp rlr rpd rpe rpl rpp rpr rpx rrd rrl rrp rrr rxp rxr xde xdr xed xee xel xep xer xex xld xlr xpd xpe xpl xpp xrd xrx xxl xxp xxx