NEERC/exclusive/tests/56.a

   1 2
   2 Q V
   3 S X
   4 L N
   5 V Z
   6 Q U
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   8 Q W
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  13 U X
  14 L S
  15 Q T
  16 R Z
  17 N X
  18 U V
  19 N X
  20 V X
  21 V Z
  22 Y O
  23 Q X
  24 L X
  25 U W
  26 Y Z