c d a d c d a d c d a b a b c b a b c b a b c d c [d d d d d d d d] d* a b a b c b a b c b a b c d c d a d c d a d c d a b
The "d" after [d d d d d d d d] cannot make a move without breaking the "no two countries using the same color" rule even after convention is changed to accommodate the real-world convention of common point not being a borderline. So either way, 4 color solution fails. It can be concluded that 4 color solution has built within it a mechanism that makes it fail when dealing with a situation of a map having a country whose length is larger than the rest of the countries. The good news is that it doesn't fail as often as previously (failing for all the even numbers), because it doesn't fail until the longer country is long enough to encounter the next "d" in its row. Nevertheless, it fails for infinity because such an occurrence is guaranteed to happen for infinity.