ddd ddo ddp ddr ddw dod doo dop dor dow dpd dpo dpp dpr dpw drd dro drp drr drw dwo dwp dwr dww odd odo odp odr oo- ood ooo oop oor oow op- opd opo opp opr opw or- ord oro orp orr owd owo owp oww p-p pdd pdo pdp pdr pod poo pop por pow ppd ppo ppp ppr ppw prd pro prp prr prw pwd pwo pwp pwr rdd rdo rdp rdr rod roo rop ror row rpd rpo rpp rpr rpw rrd rrp rrr rwd rwr wdp wdr wod woo wop wor wow wpd wpo wpp wpr wr- wrd wro wrp wrr wrw wwd wwo wwp www