Exercise: 28.13 (pg number: 1103)
(4 * 4 16 tails problem) Listing 28.14, NineTail.java, presents a solution for
the nine tails problem. Revise this program for the 4 * 4 16 tails problem.
Note it is possible that a solution may not exist for a starting pattern. If so,
report that no solution exists.