ddd ddk ddn ddo dds ddt dkk dko dks dkt dnd dnk dnn dno dns dnt dod dok don doo dos dot dsd dsk dsn dso dss dst dtd dtk dtn dto dts dtt k-t kdk kdo kds kdt kkk kkn kks kkt kn- knd knk knn kno knt kod kok kon koo kos kot ksd ksk ksn kso kss kst ktk ktn kto kts ktt ndd ndk ndn ndo nds ndt nkk nkn nko nks nkt nnk nnn nno nns nnt no- nod nok non noo nos not nsd nsk nsn nso nss nst ntd ntk ntn nto nts ntt odd odn odo ods odt okd okk oko oks on- ond onk onn ono ons ont oo- ood ook oon ooo oos oot os- osd osk osn oso oss ost ot- otd otk otn oto ots ott sdd sdk sdn sdo sds sdt sk- skd skk sko sks skt snd snk snn sno sns snt sod sok son soo sos sot ss- ssd ssk ssn sso sss sst std stk stn sto sts stt tdd tdk tdn tdo tds tdt tkk tko tks tkt tnd tnk tnn tno tns tnt to- tod tok ton too tos tot tsd tsk tsn tso tss tst ttd ttk ttn tto tts ttt