MAYBE
183.98/56.02	MAYBE
183.98/56.02	
183.98/56.02	Problem:
183.98/56.02	 a(a(a(a(x1)))) -> b(b(x1))
183.98/56.02	 b(b(a(a(x1)))) -> a(a(b(b(x1))))
183.98/56.02	 b(b(b(b(c(c(x1)))))) -> c(c(a(a(x1))))
183.98/56.02	 b(b(b(b(x1)))) -> a(a(a(a(a(a(x1))))))
183.98/56.02	 c(c(a(a(x1)))) -> b(b(a(a(c(c(x1))))))
183.98/56.02	
183.98/56.02	Proof:
183.98/56.02	 Open
183.98/56.03	EOF