Commands:

• list: List all the items saved the list.
• add: Add an item to the list.
• done: Select an item by its number and then mark the item is completed. If the user did not type an item name the app will wait For the user input a name or some names to the list.
• undone : Remove the completed flag from the selected item.
• clear: Clear all the items saved in the list.
• remove: Select an item by its number and remove it from the list.
• help: Display the help file.