Learning by numbers (part 2): Bridge over troubled water

5 -5 5-4 4 -5 6 5
-6 -6 -6 6 7 -6
-6 -6 6 5-4 4
5 -4 4 -4 6-8
6 5-4 4 5
6 8 -8 7 -8 -8
8 -8 7 -7-6 -6 6 5 6
-6 7 -8 8 -8
-8 8 7 -7-6 -6 6 5 6
-6 7 -8 8 7
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