-er -up ddd dde ddi ddn ddp ddr dds ddu ddx de- ded dee dei den dep der des deu dex di- did die dii din dip dir dis diu dix dnd dne dni dnn dnp dnr dns dpd dpe dpi dpn dpp dpr dps dpu drd dre dri drn drp drr drs dru drx dsd dse dsi dsn dsp dsr dss dsu dsx dud due dui dun dup dur dus dux dxd dxi dxn dxp dxr dxs dxx ed- edd ede edi edn edp edr eds edu edx eed eee een eep eer ees eex eid eie eii ein eip eir eis eiu eix en- end ene eni enn enp enr ens enu ep- epd epe epi epn epp epr eps epu epx erd ere eri ern erp err ers eru es- esd ese esi esn esp esr ess esu esx eu- eud eue eui eun eup eur eus eux ex- exd exe exi exp exr exs exu exx i-d idd ide idi idn idp idr ids idu idx ie- ied iee iei ien iep ier ies iex iid iie iii iin iip iir iis iiu iix in- ind ine ini inn inp inr ins inu inx ipd ipe ipi ipn ipp ipr ips ipu ipx ir- ird ire iri irn irp irr irs iru irx is- isd ise isi isn isp isr iss isu iu- iud iue iui iup iur ius ixe ixi ixn n-i ndd nde ndi ndn ndp ndr nds ndu ne- ned nee nei nen nep ner nes neu nex nid nie nii nin nip nir nis niu nix nne nni nnn nnp nns nnu npd npe npi npn npp npr nps npu nrd nre nri nrn nrp nrr nrs nru nrx nsd nse nsi nsn nsp nsr nss nsu nsx nud nue nui nun nup nur nus nuu nux nxd p-p pdd pde pdi pdn pdp pdr pds pdu pdx ped pee pei pen pep per pes peu pex pid pie pii pin pip pir pis piu pix pn- pnd pne pni pnn pnp pnr pns pnu pnx ppd ppe ppi ppn ppp ppr pps ppu ppx prd pre pri prn prp prr prs pru prx ps- psd pse psi psn psp psr pss psu psx pud pue pui pun pup pur pus puu pxe pxr pxs rdd rde rdi rdn rdp rdr rds rdu rdx re- red ree rei ren rep rer res reu rex rid rie rii rin rip rir ris rix rnd rni rnn rnp rnr rns rnu rpd rpe rpi rpn rpp rpr rps rpu rpx rrd rri rrn rrp rrr rrs rru rsd rse rsi rsn rsp rsr rss rsu rsx rud rue rui run rup rur rus ruu rux rxp rxr rxs sdd sde sdi sdn sdp sdr sds sdu se- sed see sei sen sep ser ses seu sex sid sie sii sin sip sir sis siu six snd sne sni snn snp snr sns snu spd spe spi spn spp spr sps spu spx sr- srd sre sri srn srp srr srs srx ss- ssd sse ssi ssn ssp ssr sss ssu ssx sud sue sui sun sup sur sus suu sux sxi sxn sxs sxu udd ude udi udn udp udr uds udu udx ued uee uei uen uep uer ues uid uie uii uin uip uir uis uiu un- und une uni unn unp unr uns unu unx up- upd upe upi upn upp upr ups upu upx ur- urd ure uri urn urp urr urs uru urx usd use usi usn usp usr uss usu usx uue uun uur uus uuu uxr uxu xde xdi xdr xds xed xee xen xep xer xes xeu xex xie xii xin xis xiu xix xns xnu xpd xpe xpn xpp xps xrd xrx xsi xsp xss xue xui xun xup xus xxi xxp xxx