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It doesn't matter really as you look only on size of the group and not individual connections within it. I guess author has chosen to print them in ascending order and "-" signs represents the same as " " sign, not the connections.
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It doesn't matter really as you look only on size of the group and not individual connections within it. I guess author has chosen to print them in ascending order and "-" signs represents the same as " " sign, not the connections.