d-rod ddddd diddu didio didup diiop dioid dioro dipod do-do dodoo dodro doido doiop doodo dorid dorio dorud doupi douro dridu droid drood droop drop- dropi dropo drori droup druid drupi druri duddo dudou dupri durio idio- idodi idood idoru idrop iiiii iodid iodo- ioooi ioooo iorio ipour irid- irido irori irour irupi oddup oddur odiid odori odour odudu oduro oidor ooioo ooooo oopod opio- opiod opir opodo ordro orodo oropi oruro ouir- ouoro piiri pipid pippi pippo pipri pirou pirri pirro pirui piuri piuro piuru po-po podio podo- podor poipu pooid poopo poori popoi popop poppi poppo popup poro- poroi porri porro porur prior prodd prodi proor prop- propp propr proud prudi pudor pudur puppo pupri purdi purio puro- puuri ripio ripup rirpu ro-ro roddi rodor rodri roodi roodu ropid rorid rprop ruiru u-pop udupi uiro up-do upido urdoi uropi urour ururi uuuuu