ddd dde ddn ddo ddt ddx de- ded dee den deo det dex dnd dne dnn dno dnt dod doe don doo dot dox dtd dte dtn dto dtt dtx dxd dxn dxo dxt dxx ed- edd ede edn edo edt edx eed eee een eeo eet eex en- end ene enn eno ent eo- eod eoe eon eoo eot etd ete etn eto ett etx ex- exd exe exo ext exx ndd nde ndn ndo ndt ne- ned nee nen neo net nex nne nnn nno nnt no- nod noe non noo not nox ntd nte ntn nto ntt ntx nxd nxt odd ode odn odo odt oed oee oen oeo oet oex on- ond one onn ono ont onx oo- ood oon ooo oot oox ot- otd ote otn oto ott ox- oxn oxo oxt oxx t-x tdd tde tdn tdo tdt tdx te- ted tee ten teo tet tex tnd tne tnn tno tnt tnx to- tod toe ton too tot tox ttd tte ttn tto ttt ttx txe txn txt xde xdt xed xee xen xet xex xno xod xon xoo xot xox xtx xxo xxx