def grades ():
    gpa = input ("Enter the grade point") 
    if (gpa == 4):
         letter = 'A'
    if (gpa == 3):
         letter = 'B'
    if (gpa == 2):
        letter = 'C'
    if (gpa == 1):
        letter = 'D'
    if (gpa == 0):
        letter = 'F'
    print gpa, letter