MAYBE
36.48/10.36	MAYBE
36.48/10.36	
36.48/10.36	Problem:
36.48/10.36	 a(x1) -> x1
36.48/10.36	 a(x1) -> b(c(x1))
36.48/10.36	 a(b(b(x1))) -> b(b(a(a(x1))))
36.48/10.36	 b(x1) -> x1
36.48/10.36	
36.48/10.36	Proof:
36.48/10.36	 Open
36.48/10.36	EOF