I'm having a little trouble with some code. I'm writing a library management program. I need to be able to input title, author, isbn, etc. in the program. When the program asks for the isbn it behaves as expected. When I enter any words the program terminates, but if I only enter a single letter it does what I want it to do. To make this post shorter, how do I tell the program to allow a word instead of just a single character? Thanks for the help.