MAYBE
105.10/55.33	MAYBE
105.10/55.33	
105.10/55.33	Problem:
105.10/55.33	 a(x1) -> b(x1)
105.10/55.33	 b(b(x1)) -> x1
105.10/55.33	 b(c(c(x1))) -> c(c(b(c(a(x1)))))
105.10/55.33	
105.10/55.33	Proof:
105.10/55.33	 Open
105.10/55.33	EOF