in python3, output has to look exactly like this:

it must give an error message if file is invalid

You shall create a Python script that reads in a single sentence from the user. You may either accept this input through the keyboard or use a text file as input. That is, the program may pause and wait for the user to type a sentence or it may open an existing file with the sentence inside. The choice is left to the student (I prefer reading files when developing because I don't need to keep typing in text). The script shall then parse the input string using a regular expression (import re) and detect the FANBOYS present. These words may all appear naturally in a sentence by themselves, so to count as a FANBOYS, a comma must immediately precede the conjunction. After locating each of the FANBOYS, the program shall display the separate thoughts these words link together and display the result to the screen. It shall number each thought sequentially. Using the previous example as the input string, the program would then output: 1: I ate a brownie for breakfast 2: I ate a cookie 3: I am in quarantine