Some textbook show that the grammar $G=(N,T,P,S)$ below belongs to context-senstive grammars:
- S->aSBC
- S->abc
- cB->Bc
- bG->bb
where N={S,B}, T={a,b,c}.
I am confused by the fact that the production rule cB->Bc cannot satisfy the definition of a CSG. So, why is the above grammar belongs to CSG?