HYDROPERIOD

de do ed eh er he hi ho id od oe oh oi op or oy pe pi re ye yo

dey did die dip doe dor dry dye edh err hep her hey hid hie hip hod hoe hop hoy hyp ire odd ode oho ooh ope ore ped peh per phi pie pod poh poi poo pro pry pye red rei rep rho rid rip rod roe rye yeh yep yid yip yod

dido didy died dire dodo doer door dope dopy dore dorp dorr dory drip drop dyed dyer eddo eddy heir herd hero hide hied hire hoed hoer hood hoop hope hype hypo ired odor ohed oped ordo oyer peri pied pier pood pooh poor pore prey prod pyre pyro redd redo repo ride ripe rode rood rope ropy yipe yird yirr yodh yore