-er ddd dde ddn ddo ddr ddt ddx de- ded dee den deo der det dev dex dnd dne dnn dno dnr dnt dod doe don doo dor dot dov dox drd dre drn dro drr drt drv drx dtd dte dtn dto dtr dtt dtv dtx dvd dve dvn dvr dvt dvx dxd dxn dxo dxr dxt dxx ed- edd ede edn edo edr edt edx eed eee een eeo eer eet eev eex en- end ene enn eno enr ent env eo- eod eoe eon eoo eor eot erd ere ern ero err ert erv etd ete etn eto etr ett etv etx evd eve evn evo evr evt evv ex- exd exe exo exr ext exx ndd nde ndn ndo ndr ndt ndv ne- ned nee nen neo ner net nev nex nne nnn nno nnt nnv no- nod noe non noo nor not nov nox nrd nre nrn nro nrr nrt nrv nrx ntd nte ntn nto ntr ntt ntv ntx nvd nve nvn nvt nvv nxd nxt nxv odd ode odn odo odr odt odv oed oee oen oeo oer oet oex on- ond one onn ono onr ont onx oo- ood oon ooo oor oot oov oox or- ord ore orn oro orr ort orv orx ot- otd ote otn oto otr ott otv ov- ovd ove ovo ovv ox- oxn oxo oxt oxx rdd rde rdn rdo rdr rdt rdv rdx re- red ree ren reo rer ret rev rex rnd rnn rno rnr rnt rnv rod roe ron roo ror rot rov rox rrd rrn rrr rrt rtd rte rtn rto rtr rtt rtv rtx rvd rve rvn rvo rvr rvt rvv rxr t-x tdd tde tdn tdo tdr tdt tdv tdx te- ted tee ten teo ter tet tev tex tnd tne tnn tno tnr tnt tnx to- tod toe ton too tor tot tov tox trd tre trn tro trr trt trv trx ttd tte ttn tto ttr ttt ttv ttx tvd tve tvn tvo tvr tvt tvx txe txn txt v-e vdd vde vdo vdr vdt vdv vdx ved vee ven veo ver vet vex vn- vnd vno vnr vnv vod voe von voo vor vot vov vox vrd vre vrn vrr vrt vte vto vtr vtt vtv vtx vvo vvr vvt vvv vxd vxr vxv xde xdr xdt xdv xed xee xen xer xet xev xex xno xod xon xoo xor xot xov xox xrd xrt xrx xtr xtv xtx xvt xxo xxv xxx