DEEPGOING

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

dee den die dig din dip doe dog don egg ego end eng eon ged gee gen gid gie gig gin gip god igg ion nee neg nip nod nog ode one ope ped pee peg pen pie pig pin pod poi

deep dene deni dine ding dino doge done dong dope edge eide geed gene gied gien gone gong need neep nide node nodi nogg nope ogee oped open peed peen pein pend peon pied pine ping pion pond pone pong