**IN PYTHON**

Write a program that translates a letter grade into a number grade. Letter grades are A, B, C, D, and F, possibly followed by + or -. Their numeric values are 4, 3, 2, 1 and 0. There is no F+ or F-. A + increases the numeric value by 0.3, a decreases it by 0.3. However, an A+ has value 4.0.

Enter a Letter grade: B-

The numeric value is 2.7

Test Cases:

B- (should print 2.7)

A+ (should print 4.0)

B+ (should print 3.3)

C (should print 2.0)

F+ (should print 0.0)

G (should print no such grade)