d-rod ddddd diddu didin didio didno didon diino dindi dindo dinio dino- dinon dinur dioid dioni diono dioon dioro diurn do-do dodon dodoo dodro doido dondi dondo donon donor doodo dooin doorn dorid dorin dorio dorno doron dorud douin douro dridu drinn drino droid drood droon drori droun druid druri duddo dudin dudon dudou duino dundi dundo dunin dunno dunod dunun durin durio durno duron iddon ididn idio- idodi idood idoru idron idunn iiiii iiuni indi- indin indio indir indo- indor indri indru indur iniid inini inio inio- inion inniu inonu inoor inori inour inrio inrun inund inurn iodid iodin iodo- iono- ioooi ioooo iorio irid- irido irind irinn irion irono irori irour iunno ndour nduru nidor niidu ninon ninur niono niord nioro nnooo no-do no-no nodi- non-u nondo nonin nonio nonni nonno noonu noord noori nordo norid norin norio noron norro norun nouni nouri nu-nu nudi- nudur nunni nunon nunun nuoro nurin nurri nurun oddur odiid odori odour odrin odudu oduro oidor oino- oinoi oiron onin onion onir- oniro onond onoon onorn onour onrio ooioo oonin ooooo ordon ordro orino orion orni- ornon orodo orono orrin oruro oudin oudon ouir- ouoro ourno ridin rindi rindr rindu rioni ro-ro roddi rodin rodon rodor rodri rondo ronin ronno roodi roodu roond rorid round rudin rudno ruino ruiru rundi rundu runin runo- runon u-n-i u-nii uiro undid undri undun undur unido unini uninn union unnun unnur unoor unorn unrid unrun unurn urdoi urin- urour ururi uuuuu