MAYBE
32.15/10.30	MAYBE
32.15/10.30	
32.15/10.30	Problem:
32.15/10.30	 a(x1) -> x1
32.15/10.30	 a(b(x1)) -> b(b(a(a(c(x1)))))
32.15/10.30	 b(x1) -> x1
32.15/10.30	 c(a(c(x1))) -> x1
32.15/10.30	
32.15/10.30	Proof:
32.15/10.30	 Open
32.15/10.31	EOF