Write a Python program that prompts the user to enter a list of words and stores in a list only those words whose first letter occurs again within the word (for example, 'Baboon'). The program should...

Write a Python program that prompts the user to enter a list of words and stores in a list only those words whose first letter occurs again within the word (for example, 'Baboon').  The program should display the resulting list.

NOTE:  'Baboon' starts with a capital letter and should be included in the list (therefore, the test is not case-sensitive).  When you print the word list, ensure you maintain case-sensitivity; i.e. Both 'Baboon' and 'baboon' should be in the list that prints out, if they were provided as input by the user.