-er -up ddd dde ddn ddo ddp ddr ddt ddu de- ded dee den deo dep der det deu dnd dne dnn dno dnp dnr dnt dod doe don doo dop dor dot dou dpd dpe dpn dpo dpp dpr dpt dpu drd dre drn dro drp drr drt dru dtd dte dtn dto dtp dtr dtt dtu dud due dun duo dup dur dut ed- edd ede edn edo edp edr edt edu eed eee een eeo eep eer eet en- end ene enn eno enp enr ent enu eo- eod eoe eon eoo eop eor eot eou ep- epd epe epn epo epp epr ept epu erd ere ern ero erp err ert eru etd ete etn eto etp etr ett etu eu- eud eue eun eup eur eut ndd nde ndn ndo ndp ndr ndt ndu ne- ned nee nen neo nep ner net neu nne nnn nno nnp nnt nnu no- nod noe non noo nop nor not nou npd npe npn npo npp npr npt npu nrd nre nrn nro nrp nrr nrt nru ntd nte ntn nto ntp ntr ntt ntu nud nue nun nuo nup nur nut nuu odd ode odn odo odp odr odt odu oed oee oen oeo oep oer oet on- ond one onn ono onp onr ont onu oo- ood oon ooo oop oor oot op- opd ope opn opo opp opr opt or- ord ore orn oro orp orr ort oru ot- otd ote otn oto otp otr ott otu ou- oud oue oun ouo oup our out p-p pdd pde pdn pdo pdp pdr pdt pdu ped pee pen peo pep per pet peu pn- pnd pne pnn pno pnp pnr pnt pnu pod poe pon poo pop por pot pou ppd ppe ppn ppo ppp ppr ppt ppu prd pre prn pro prp prr prt pru pt- ptd pte ptn pto ptp ptr ptt ptu pud pue pun pup pur put puu rdd rde rdn rdo rdp rdr rdt rdu re- red ree ren reo rep rer ret reu rnd rnn rno rnp rnr rnt rnu rod roe ron roo rop ror rot rou rpd rpe rpn rpo rpp rpr rpt rpu rrd rrn rrp rrr rrt rru rtd rte rtn rto rtp rtr rtt rtu rud rue run ruo rup rur rut ruu tdd tde tdn tdo tdp tdr tdt tdu te- ted tee ten teo tep ter tet teu tnd tne tnn tno tnp tnr tnt to- tod toe ton too top tor tot tou tpd tpe tpn tpo tpp tpr tpt tpu trd tre trn tro trp trr trt tru ttd tte ttn tto ttp ttr ttt ttu tud tue tun tuo tup tur tut tuu udd ude udn udo udp udr udt udu ued uee uen uep uer uet un- und une unn uno unp unr unt unu uod uoe uon uoo uop uor uot up- upd upe upn upo upp upr upt upu ur- urd ure urn uro urp urr urt uru utd ute utn uto utp utr utt utu uue uun uur uut uuu