Write a Python program with a function that accepts a string as an argument and returns a copy of the string with the first character of each sentence with upper case letter. For example, if the argument is "before the important business meeting, she had to make her own coffee. what does it mean? we don't know." the function should return the string "Before the important business meeting, she had to make her own coffee. What does it mean? We don't know." The program should let the user enter a string and then pass it to the function. The modified string should be displayed. Your code should consider the name of at least two exceptions.