Python Program

Write a program that reads from a file named "Names.txt" the names of people in the form of "X ben Y" or "X bent Y". In other words, we're talking about X being the son or the daughter of Y. The file will contain a number of such entries. Your job is to analyze them and come up with a list that starts with the Grand-grand father followed by his sons and daughters and then his grand-sons and/or grand-daughters. For example, if the "Names.txt" file contained the following entries: A ben B B ben C D ben A E ben A F ben E

then your program should output the following file named "Tree.txt": C B A D, E F