Write a program that uses a multiset of strings to keep track of a list of chores that you have to accomplish today. The user ofthe program can request several services: 1) add an item to the list of chores; 2) ask how many chores are in the list; 3) use the iterator to print the list of chores to the screen; 4) delete an item from the list; 5) exit the program. If you know how to read and write strings from a file, then have the program obtain its initial list of chores from a file. When the program ends, it should write all unfinished chores back to this file.
For  Programming Project 19, you have to do the part for having the program obtain its initial list of chores from a file. It is NOT optional since you should know how to work with strings and files.
