-er -up ddd dde ddo ddp ddr dds ddu ddx de- ded dee deo dep der des deu dex dod doe doo dop dor dos dou dox dpd dpe dpo dpp dpr dps dpu drd dre dro drp drr drs dru drx dsd dse dso dsp dsr dss dsu dsx dud due duo dup dur dus dux dxd dxo dxp dxr dxs dxx ed- edd ede edo edp edr eds edu edx eed eee eeo eep eer ees eex eo- eod eoe eoo eop eor eos eou ep- epd epe epo epp epr eps epu epx erd ere ero erp err ers eru es- esd ese eso esp esr ess esu esx eu- eud eue eup eur eus eux ex- exd exe exo exp exr exs exu exx odd ode odo odp odr ods odu oed oee oeo oep oer oes oex oo- ood ooo oop oor oos oox op- opd ope opo opp opr ops opx or- ord ore oro orp orr ors oru orx os- osd ose oso osp osr oss osu osx ou- oud oue ouo oup our ous ox- oxo oxx p-p pdd pde pdo pdp pdr pds pdu pdx ped pee peo pep per pes peu pex pod poe poo pop por pos pou pox ppd ppe ppo ppp ppr pps ppu ppx prd pre pro prp prr prs pru prx ps- psd pse pso psp psr pss psu psx pud pue pup pur pus puu pxe pxr pxs rdd rde rdo rdp rdr rds rdu rdx re- red ree reo rep rer res reu rex rod roe roo rop ror ros rou rox rpd rpe rpo rpp rpr rps rpu rpx rrd rrp rrr rrs rru rsd rse rso rsp rsr rss rsu rsx rud rue ruo rup rur rus ruu rux rxp rxr rxs sdd sde sdo sdp sdr sds sdu se- sed see seo sep ser ses seu sex sod soe soo sop sor sos sou sox spd spe spo spp spr sps spu spx sr- srd sre sro srp srr srs srx ss- ssd sse sso ssp ssr sss ssu ssx sud sue suo sup sur sus suu sux sxs sxu udd ude udo udp udr uds udu udx ued uee uep uer ues uod uoe uoo uop uor uos uox up- upd upe upo upp upr ups upu upx ur- urd ure uro urp urr urs uru urx usd use uso usp usr uss usu usx uue uur uus uuu uxo uxr uxu xde xdr xds xed xee xep xer xes xeu xex xod xoo xop xor xos xox xpd xpe xpo xpp xps xrd xrx xsp xss xue xup xus xxo xxp xxx