class Grade:
    def __init__(self, scores):
        self.scores = scores
        self.grades = []

    def make_grades(self):
        for s in self.scores:
            if s >= 90:
                self.grades.append('A')
            elif s >= 80:
                self.grades.append('B')
            else:
                self.grades.append('C')

    def show(self):
        print("점수:", self.scores)
        print("등급:", self.grades)


scores = []

n = int(input())
for i in range(n):
    score = int(input())
    scores.append(score)

g = Grade(scores)
g.make_grades()
g.show()