What is the source of the challenge?

Is there a version in English?

I am having very serious trouble trying to make sense of

"your bank accounts can have multiple accounts for money".

I note that in your C# code a customer has an ID, a first name,

and a last name.�� There is nothing about this in the challenge

text, and since some people have one-part names, I have a three-

part name, and my father had and my grand-daughter has four-part

names, I should think that simply representing a name as a string

without caring about subdivisions would be better.�� What I'm

getting at is this: with a specification like that, how will you

know when your code is correct?