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[Dom]

I'm working on bending some of those childrens books with the buttons that trigger sounds on the side and this is my problem:
each book has 10 buttons each corresponding to a differnt sound, and these buttons  are carbon tracks printed onto a sheet of plastic which are pressed down onto another little square of carbon that makes the connection, however there are 3 tracks above each square, and not 2.
Does anyone have any advice?
I am slowly working out what conections are made at each popint and also the ressistance of each track
thanks