# 411042004曾巧曦 東華GPA3/22

GPA= int(input("請輸入GPA"))
if 100 >= GPA >= 90:
    print('Grade is: A+')
elif 89 >= GPA >= 85 :
    print('Grade is: A')
elif 84 >= GPA >= 80 :
    print('Grade is: A-')
elif 79 >= GPA >= 77 :
    print('Grade is: B+')
elif 76 >= GPA >= 73:
    print('Grade is: B')
elif 72 >= GPA >= 70 :
    print('Grade is: B-')
elif 69 >= GPA >= 67 :
    print('Grade is: C+')
elif 66 >= GPA >= 63 :
    print('Grade is: C')
elif 62 >= GPA >= 60 :
    print('Grade is: C-')
elif 59 >= GPA >= 50:
    print('Grade is: D')
else:
    print('Grade is: E')