# adjacent nodes for each node.

22
22

Board

o.
oo

Empty Connected Components

  .  1
  .  .

White Connected Components

  0  .
  0  0

Components and their adjacent components

Type: o  Number: 0
  Cells: (0,0) (1,0) (1,1)
  Adjacent Components: 1
Type: .  Number: 1
  Cells: (0,1)
  Adjacent Components: 0
WC 0.  # UN = 1 : 1

o.
oo

Killable components: 0
Removing EC 1 from WC 0's unsafe list

..
..

3