The file Months. txt has 12 lines with each line containing one of the months of the year. Write a program that displays the months containing the letter r. The program should use a global variable months that is initialized as the empty list. The function main should call three functions, one to fill the list months with the contents of the text file, one to delete from the list months the months that do not contain the letter r, and one to display the names of the months remaining in the list. Can you please solve this in python.