ddd ddk ddo ddp dds ddy dkk dko dkp dks dod dok doo dop dos doy dpd dpk dpo dpp dps dsd dsk dso dsp dss dsy dy- dyd dyk dyo dyp dys dyy kdk kdo kdp kds kdy kkk kkp kks kky kod kok koo kop kos koy kpd kpk kpo kpp kps ksd ksk kso ksp kss kyd kyo kyp kys odd odo odp ods okd okk oko okp oks oo- ood ook ooo oop oos op- opd opk opo opp ops opy os- osd osk oso osp oss oyd oyo oys p-p pdd pdk pdo pdp pds pkd pko pkp pks pky pod pok poo pop pos poy ppd ppk ppo ppp pps ps- psd psk pso psp pss psy py- pyd pyk pyo pys sdd sdk sdo sdp sds sdy sk- skd skk sko skp sks sky sod sok soo sop sos soy spd spk spo spp sps spy ss- ssd ssk sso ssp sss sy- syd syk syp sys ydo yds ydy ykk yod yok yoo yop yos yoy ypd ypo yps ysk yso ysp yss ysy yys yyy