''' 
Author name: <Your name here>
This program counts the total of students that get specific grades.
'''

string_val = "User1:Grade-A, User2:Grade-B, User3:Grade-C, User4:Grade-A, User5:Grade-B, User6: Grade-A, User7: Grade-C, User8: Grade-B, User9:Grade-A, User10: Grade-A, User11: Grade-C, User12: Grade-A, User13: Grade-B, User14: Grade-C, User15: Grade-A"