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//
// Student: Russell Lowke
//     T.F: Francis Crick
// Unit Nine, pencil-and-paper part 1 - question 2 [worth 2pts],  8/7/2002
//
//  When a binary tree of characters is listed in postorder,
//  the result is IKHAFLMBCQ.  Inorder traversal gives IAKHQCFLBM.
//  Construct the tree.