-up ddd dde ddp dds ddu ddx de- ded dee dep des deu dex dpd dpe dpp dps dpu dsd dse dsp dss dsu dsx dud due dup dus dux dxd dxp dxs dxx ed- edd ede edp eds edu edx eed eee eep ees eex ep- epd epe epp eps epu epx es- esd ese esp ess esu esx eu- eud eue eup eus eux ex- exd exe exp exs exu exx p-p pdd pde pdp pds pdu pdx ped pee pep pes peu pex ppd ppe ppp pps ppu ppx ps- psd pse psp pss psu psx pud pue pup pus puu pxe pxs sdd sde sdp sds sdu se- sed see sep ses seu sex spd spe spp sps spu spx ss- ssd sse ssp sss ssu ssx sud sue sup sus suu sux sxs sxu udd ude udp uds udu udx ued uee uep ues up- upd upe upp ups upu upx usd use usp uss usu usx uue uus uuu uxu xde xds xed xee xep xes xeu xex xpd xpe xpp xps xsp xss xue xup xus xxp xxx