MAYBE
142.79/56.33	MAYBE
142.79/56.33	
142.79/56.33	Problem:
142.79/56.33	 a(a(b(x1))) -> b(a(b(x1)))
142.79/56.33	 b(a(x1)) -> a(b(b(x1)))
142.79/56.33	 b(c(a(x1))) -> c(c(a(a(b(x1)))))
142.79/56.33	
142.79/56.33	Proof:
142.79/56.33	 Open
142.79/56.35	EOF