Please don't use the asterisk symbol!
It makes it much harder to decode the grades that are being discussed when you have to figure out which As are supposed to have the star after them, based on where the bold text begins and ends.
It's better to write the word 'star' e.g. AstarAstarA for two A star grades and one A grade.
Assuming of course you have MN children for whom Astar and A grades are the only grades in contention 😀