Assign every state a number geographically. Start with Maine, assign it #1,
Vermont #2, NH #3, etc. Then when you input a state, lets use Rhode Island
which would be #5, #4 (Massachussets), and Connecticut (#6), would have to
be adjacent to the state in question. Rough solution, but it could work with
a bit of planning. If California is #47, then #46 Nevada and #48 Oregon
should pop up as neighbors. You might run into problems with Alaska and
Hawaii however, so just make sure #49, 50 and 51 (Puerto Rico) don't have
any neighbors. Lemme think about this a bit more at work tonight and ill let
you know what I come up with.
