Write a python code that gets a mark from the teacher and prints according to the below grading system (A, B, C, etc):

Grade Point 90% to 100% 80% to 89% 75% to 79% 70% to 74% 65% to 69% 60% to 64% 55% to 59 50% to 54% (See 8.9) 0% to 49% (Not a Pass) Value 4.0 4.0 3.5 3.0 2.5 2.0 B+ 0.0