-er -ey ddd dde ddn ddo ddr ddt ddx ddy de- ded dee den deo der det dex dey dnd dne dnn dno dnr dnt dny dod doe don doo dor dot dox doy drd dre drn dro drr drt drx dry dtd dte dtn dto dtr dtt dtx dty dxd dxn dxo dxr dxt dxx dy- dyd dye dyn dyo dyr dyy ed- edd ede edn edo edr edt edx edy eed eee een eeo eer eet eex eey en- end ene enn eno enr ent eny eo- eod eoe eon eoo eor eot erd ere ern ero err ert ery etd ete etn eto etr ett etx ety ex- exd exe exo exr ext exx exy eyd eye eyn eyo eyr eyt ndd nde ndn ndo ndr ndt ndy ne- ned nee nen neo ner net nex ney nne nnn nno nnt no- nod noe non noo nor not nox noy nrd nre nrn nro nrr nrt nrx nry ntd nte ntn nto ntr ntt ntx nxd nxt nyd nye nyn nyo nyt nyx nyy odd ode odn odo odr odt oed oee oen oeo oer oet oex oey on- ond one onn ono onr ont onx ony oo- ood oon ooo oor oot oox or- ord ore orn oro orr ort orx ory ot- otd ote otn oto otr ott ox- oxn oxo oxt oxx oxy oyd oye oyo rdd rde rdn rdo rdr rdt rdx rdy re- red ree ren reo rer ret rex rey rnd rnn rno rnr rnt rny rod roe ron roo ror rot rox roy rrd rrn rrr rrt rtd rte rtn rto rtr rtt rtx rty rxr ry- ryd rye ryn ryo ryr ryy t-x tdd tde tdn tdo tdr tdt tdx tdy te- ted tee ten teo ter tet tex tey tnd tne tnn tno tnr tnt tnx to- tod toe ton too tor tot tox toy trd tre trn tro trr trt trx try ttd tte ttn tto ttr ttt ttx tty txe txn txt tyd tye tyn tyo tyr tyt xde xdr xdt xed xee xen xer xet xex xno xod xon xoo xor xot xox xrd xrt xrx xry xtr xtx xty xxo xxx xxy xyr xyy yde ydn ydo ydt ydy yed yee yen yeo yer yet yex yey ynd yne ynn yny yod yoe yon yoo yor yot yox yoy yre yrn yro yrt ytd yte ytn yto ytr ytt yxe yxy yye yyt yyy