Exercício 08.22
Converta para a Forma Normal de Chomsky a gramática:
G = ({S, A, B, C}, {a, b}, P, S)
P = {< S > -> < A > < B >
| < C > < A >
< A > -> a
< B > -> < B > < C >
| < A > < B >
< C > -> a < B >
| b }