ddd ddn ddo ddt ddx dnd dnn dno dnt dod don doo dot dox dtd dtn dto dtt dtx dxd dxn dxo dxt dxx ndd ndn ndo ndt nnn nno nnt no- nod non noo not nox ntd ntn nto ntt ntx nxd nxt odd odn odo odt on- ond onn ono ont onx oo- ood oon ooo oot oox ot- otd otn oto ott ox- oxn oxo oxt oxx t-x tdd tdn tdo tdt tdx tnd tnn tno tnt tnx to- tod ton too tot tox ttd ttn tto ttt ttx txn txt xdt xno xod xon xoo xot xox xtx xxo xxx