Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.
Just one thing, it is not said that Greyback dies in the book and it is confirmed in his wiki that he doesn't die from Trelawneys crystal ball : https://harrypotter.fandom.com/wiki/Fenrir_Greyback#Battle_of_Hogwarts
Just one thing, it is not said that Greyback dies in the book and it is confirmed in his wiki that he doesn't die from Trelawneys crystal ball : https://harrypotter.fandom.com/wiki/Fenrir_Greyback#Battle_of_Hogwarts