ddd ddn ddo dds ddt dnd dnn dno dns dnt dod don doo dos dot dsd dsn dso dss dst dtd dtn dto dts dtt ndd ndn ndo nds ndt nnn nno nns nnt no- nod non noo nos not nsd nsn nso nss nst ntd ntn nto nts ntt odd odn odo ods odt on- ond onn ono ons ont oo- ood oon ooo oos oot os- osd osn oso oss ost ot- otd otn oto ots ott sdd sdn sdo sds sdt snd snn sno sns snt sod son soo sos sot ss- ssd ssn sso sss sst std stn sto sts stt tdd tdn tdo tds tdt tnd tnn tno tns tnt to- tod ton too tos tot tsd tsn tso tss tst ttd ttn tto tts ttt