where the perfect match would be (a 0, b 0), (a 1, b 2), (a 2, b 1) and (a 3, b 3). My attempt: I wrote some code which performs a greedy algorithm to find a match and for G 4 and G 5 I see that the output is a perfect match. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.