MAYBE
107.47/55.34	MAYBE
107.47/55.34	
107.47/55.34	Problem:
107.47/55.34	 a(x1) -> b(x1)
107.47/55.34	 a(c(x1)) -> c(c(c(a(b(x1)))))
107.47/55.34	 b(b(x1)) -> a(x1)
107.47/55.34	
107.47/55.34	Proof:
107.47/55.34	 Open
107.47/55.35	EOF