CFG construction( Want to construct a context free grammar for the language { W c^|w| W ,where w ∈ {a,b}} and |w| is the length of the string W. )

Question

Want to construct a context free grammar for the language { W c^|w| W ,where w ∈ {a,b}} and |w| is the length of the string W. It would be helpful ,as there is no specific