PERDRIGON

de do ed en er go id in ne no od oe oi on op or pe pi re

den die dig din dip doe dog don dor ego end eng eon erg ern err ged gen gid gie gin gip god gor ion ire neg nip nod nog nor ode one ope ore ped peg pen per pie pig pin pod poi pro red reg rei rep rid rig rin rip rod roe

deni dine ding dino dire doer doge done dong dope dore dorp dorr dreg drip drop ergo gied gien gird girn giro goer gone gore gorp grid grin grip inro ired iron nerd nide node nodi noir nope nori ogre oped open pein pend peon peri pied pier pine ping pion pirn pond pone pong pore porn prig prod prog redo rein rend repo ride rind ring ripe rode rope