Welcome to the library management system, please type your commands.
> Realastic Case added to the system.
> Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6 added to the system.
> Lab5 – Interpreter added to the system.
> Student M added to the system.
> International Student N added to the system.
> Success! Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6 is borrowed by Student M.
> Success! Lab5 – Interpreter is borrowed by Student M.
> Success! Realastic Case is borrowed by International Student N.
> Success! The following book has been returned:
1 Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6
> Success! Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6 is borrowed by International Student N.
> Fail! The book was borrowed by another customer.
> Unknown command!
> Success! The following book has been returned:
0 Realastic Case
> Success! The following book has been returned:
1 Vg101. Introduction to Computer 

Welcome to the library management system, please type your commands.
> Realastic Case added to the system.
> Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6 added to the system.
> Lab5 – Interpreter added to the system.
> Student M added to the system.
> International Student N added to the system.
> Success! Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6 is borrowed by Student M.
> Success! Lab5 – Interpreter is borrowed by Student M.
> Success! Realastic Case is borrowed by International Student N.
> Success! The following book has been returned:
1 Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6
> Success! Vg101. Introduction to Computer and Programming (Fall 2020) Homework #6 is borrowed by International Student N.
> Fail! The book was borrowed by another customer.
> Unknown command!
> Success! The following book has been returned:
0 Realastic Case
> Success! The following book has been returned:
1 Vg101. Introduction to Computer