-er -up ddd dde ddn ddo ddp ddr dds ddu de- ded dee den deo dep der des deu dnd dne dnn dno dnp dnr dns dod doe don doo dop dor dos dou dpd dpe dpn dpo dpp dpr dps dpu drd dre drn dro drp drr drs dru dsd dse dsn dso dsp dsr dss dsu dud due dun duo dup dur dus ed- edd ede edn edo edp edr eds edu eed eee een eeo eep eer ees en- end ene enn eno enp enr ens enu eo- eod eoe eon eoo eop eor eos eou ep- epd epe epn epo epp epr eps epu erd ere ern ero erp err ers eru es- esd ese esn eso esp esr ess esu eu- eud eue eun eup eur eus ndd nde ndn ndo ndp ndr nds ndu ne- ned nee nen neo nep ner nes neu nne nnn nno nnp nns nnu no- nod noe non noo nop nor nos nou npd npe npn npo npp npr nps npu nrd nre nrn nro nrp nrr nrs nru nsd nse nsn nso nsp nsr nss nsu nud nue nun nuo nup nur nus nuu odd ode odn odo odp odr ods odu oed oee oen oeo oep oer oes on- ond one onn ono onp onr ons onu oo- ood oon ooo oop oor oos op- opd ope opn opo opp opr ops or- ord ore orn oro orp orr ors oru os- osd ose osn oso osp osr oss osu ou- oud oue oun ouo oup our ous p-p pdd pde pdn pdo pdp pdr pds pdu ped pee pen peo pep per pes peu pn- pnd pne pnn pno pnp pnr pns pnu pod poe pon poo pop por pos pou ppd ppe ppn ppo ppp ppr pps ppu prd pre prn pro prp prr prs pru ps- psd pse psn pso psp psr pss psu pud pue pun pup pur pus puu rdd rde rdn rdo rdp rdr rds rdu re- red ree ren reo rep rer res reu rnd rnn rno rnp rnr rns rnu rod roe ron roo rop ror ros rou rpd rpe rpn rpo rpp rpr rps rpu rrd rrn rrp rrr rrs rru rsd rse rsn rso rsp rsr rss rsu rud rue run ruo rup rur rus ruu sdd sde sdn sdo sdp sdr sds sdu se- sed see sen seo sep ser ses seu snd sne snn sno snp snr sns snu sod soe son soo sop sor sos sou spd spe spn spo spp spr sps spu sr- srd sre srn sro srp srr srs ss- ssd sse ssn sso ssp ssr sss ssu sud sue sun suo sup sur sus suu udd ude udn udo udp udr uds udu ued uee uen uep uer ues un- und une unn uno unp unr uns unu uod uoe uon uoo uop uor uos up- upd upe upn upo upp upr ups upu ur- urd ure urn uro urp urr urs uru usd use usn uso usp usr uss usu uue uun uur uus uuu