MAYBE
143.91/55.39	MAYBE
143.91/55.39	
143.91/55.39	Problem:
143.91/55.39	 a(x1) -> b(x1)
143.91/55.39	 a(a(b(c(x1)))) -> a(c(c(a(a(a(x1))))))
143.91/55.39	
143.91/55.39	Proof:
143.91/55.39	 Open
143.91/55.40	EOF