ddd ddo ddp ddr dds ddy dod doo dop dor dos doy dpd dpo dpp dpr dps drd dro drp drr drs dry dsd dso dsp dsr dss dsy dy- dyd dyo dyp dyr dys dyy odd odo odp odr ods oo- ood ooo oop oor oos op- opd opo opp opr ops opy or- ord oro orp orr ors ory os- osd oso osp osr oss oyd oyo oys p-p pdd pdo pdp pdr pds pod poo pop por pos poy ppd ppo ppp ppr pps prd pro prp prr prs pry ps- psd pso psp psr pss psy py- pyd pyo pyr pys rdd rdo rdp rdr rds rdy rod roo rop ror ros roy rpd rpo rpp rpr rps rrd rrp rrr rrs rsd rso rsp rsr rss ry- ryd ryo ryr rys ryy sdd sdo sdp sdr sds sdy sod soo sop sor sos soy spd spo spp spr sps spy sr- srd sro srp srr srs sry ss- ssd sso ssp ssr sss sy- syd syp syr sys ydo yds ydy yod yoo yop yor yos yoy ypd ypo yps yro yrp yrs yso ysp ysr yss ysy yys yyy