MAYBE
53.81/25.05	MAYBE
53.81/25.05	
53.81/25.05	Problem:
53.81/25.05	 a(x1) -> x1
53.81/25.05	 a(x1) -> b(c(x1))
53.81/25.05	 c(b(b(b(x1)))) -> b(b(a(a(x1))))
53.81/25.05	
53.81/25.05	Proof:
53.81/25.05	 Open
53.81/25.06	EOF