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#!/usr/bin/perl

...
0        x
1     x                 x
2

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[
  [1, 1, 3, "A"],
...
0  A  A  E  Y  Y  Y  Y  F  D  D  D  D
1  G  H  H  Y  Y  Y  Y  I  D  D  D  D
2  J  H  H  K  L  M  N  O  D  D  D  D