I have this grammar that I want to describe in english. I understand how to describe most grammar but I have never come across one that uses commas between non-terminals. My guess is that it means "AND" but I am not sure and I need some help. This is the grammar:
<S> => <A>,<B>,<C>
<A> => 0<A>|a
<B> => 1<B>|b
<C> => 2<C>|c