MAYBE
131.43/55.38	MAYBE
131.43/55.38	
131.43/55.38	Problem:
131.43/55.38	 a(x1) -> b(x1)
131.43/55.38	 b(a(c(x1))) -> c(a(c(a(a(x1)))))
131.43/55.38	 c(c(x1)) -> x1
131.43/55.38	
131.43/55.38	Proof:
131.43/55.38	 Open
131.43/55.38	EOF