Eny.

This is particularly good for a table game or in any situation where there is no room for moving around. Announce that there is a word in the English language that ends in “eny,” pronounced like “any.” It is necessary to put just one letter at the beginning to make it a very common and much used word. Suggest that they begin with “a” putting every letter of the alphabet in turn before “eny” till the proper letter is found. The usual process is this: “A-eny, b-eny, c-eny, d-eny, f-eny, g-eny, h-eny,” and so on through the entire alphabet until an impatient “Why there isn’t a single letter that will do it,” calls forth your positive assurance that there is a letter that will do it.

If they simply cannot get it, ask them to change the accent. Finally they will arrive. “D-eny” is a perfectly good word.