ddd ddk ddn ddo ddr dds dkk dko dkr dks dnd dnk dnn dno dnr dns dod dok don doo dor dos drd drk drn dro drr drs dsd dsk dsn dso dsr dss kdk kdo kdr kds kkk kkn kkr kks kn- knd knk knn kno knr kod kok kon koo kor kos krd krk krn kro krr krs ksd ksk ksn kso ksr kss ndd ndk ndn ndo ndr nds nkk nkn nko nkr nks nnk nnn nno nns no- nod nok non noo nor nos nrd nrk nrn nro nrr nrs nsd nsk nsn nso nsr nss odd odn odo odr ods okd okk oko okr oks on- ond onk onn ono onr ons oo- ood ook oon ooo oor oos or- ord ork orn oro orr ors os- osd osk osn oso osr oss rdd rdn rdo rdr rds rkk rko rks rnd rnn rno rnr rns rod rok ron roo ror ros rrd rrk rrn rrr rrs rsd rsk rsn rso rsr rss sdd sdk sdn sdo sdr sds sk- skd skk sko skr sks snd snk snn sno snr sns sod sok son soo sor sos sr- srd srk srn sro srr srs ss- ssd ssk ssn sso ssr sss