DIPHTHEROID

de do ed eh er et he hi ho id it od oe oh oi op or pe pi re ti to

did die dip dit doe dor dot edh eth heh hep her het hid hie hip hit hod hoe hop hot ire odd ode ope opt ore ort ped peh per pet phi pht pie pit pod poh poi pot pro red rei rep ret rho rid rip rod roe rot ted the tho tie tip tod toe top tor

dido died diet dipt dire dirt dite doer doit dope dore dorp dote doth drip drop eddo edit heir herd hero heth hide hied hire hoed hoer hope ired irid ohed oped peri pert phot pied pier pith poet pore port prod redd redo repo ride riot ripe rite rode rope rote roti thio thir thro tide tied tier tipi tire tiro toed tope toph topi tore tori trio trip trod trop