MAYBE
34.77/10.34	MAYBE
34.77/10.34	
34.77/10.34	Problem:
34.77/10.34	 a(x1) -> x1
34.77/10.34	 a(b(x1)) -> b(b(a(c(x1))))
34.77/10.34	 b(b(x1)) -> a(x1)
34.77/10.34	 c(c(x1)) -> x1
34.77/10.34	
34.77/10.34	Proof:
34.77/10.34	 Open
34.77/10.34	EOF