Python: the set should be displayed in order of the class with out repetition

Unique Works Write a program that opens a specified text file and then displays a list of all the unique words found in the file. Hint: Store each word as an element of a sel. Create a file courses.txt as the specified file with the following items. courses. CIS101 2 CIS201 CIS301 CIS481 CIS402 CTS201 CIS101 Use: 1. Aset 2. for statement 3. open() read split()