-er ddd dde ddn ddo ddp ddr ddt de- ded dee den deo dep der det dnd dne dnn dno dnp dnr dnt dod doe don doo dop dor dot dpd dpe dpn dpo dpp dpr dpt drd dre drn dro drp drr drt dtd dte dtn dto dtp dtr dtt ed- edd ede edn edo edp edr edt eed eee een eeo eep eer eet en- end ene enn eno enp enr ent eo- eod eoe eon eoo eop eor eot ep- epd epe epn epo epp epr ept erd ere ern ero erp err ert etd ete etn eto etp etr ett ndd nde ndn ndo ndp ndr ndt ne- ned nee nen neo nep ner net nne nnn nno nnp nnt no- nod noe non noo nop nor not npd npe npn npo npp npr npt nrd nre nrn nro nrp nrr nrt ntd nte ntn nto ntp ntr ntt odd ode odn odo odp odr odt oed oee oen oeo oep oer oet on- ond one onn ono onp onr ont oo- ood oon ooo oop oor oot op- opd ope opn opo opp opr opt or- ord ore orn oro orp orr ort ot- otd ote otn oto otp otr ott p-p pdd pde pdn pdo pdp pdr pdt ped pee pen peo pep per pet pn- pnd pne pnn pno pnp pnr pnt pod poe pon poo pop por pot ppd ppe ppn ppo ppp ppr ppt prd pre prn pro prp prr prt pt- ptd pte ptn pto ptp ptr ptt rdd rde rdn rdo rdp rdr rdt re- red ree ren reo rep rer ret rnd rnn rno rnp rnr rnt rod roe ron roo rop ror rot rpd rpe rpn rpo rpp rpr rpt rrd rrn rrp rrr rrt rtd rte rtn rto rtp rtr rtt tdd tde tdn tdo tdp tdr tdt te- ted tee ten teo tep ter tet tnd tne tnn tno tnp tnr tnt to- tod toe ton too top tor tot tpd tpe tpn tpo tpp tpr tpt trd tre trn tro trp trr trt ttd tte ttn tto ttp ttr ttt