MAYBE
32.22/10.30	MAYBE
32.22/10.30	
32.22/10.30	Problem:
32.22/10.30	 a(x1) -> x1
32.22/10.30	 a(x1) -> b(x1)
32.22/10.30	 a(c(x1)) -> c(c(a(a(b(x1)))))
32.22/10.30	 b(b(x1)) -> x1
32.22/10.30	
32.22/10.30	Proof:
32.22/10.30	 Open
32.22/10.30	EOF