Mine:
S+: Adlay, Zinnia
S: Corbett, Easter Honeysuckle, Hinoki School, Sigilaria, Cat Cymbium, Sping Star School
A: Pavonia, Roman
I guess B, C, D can easily be determined by their number of skill and quality of skill, those with 4-5 skills 8%-15% belong to D, more than 4-5 skills C, and better B