199.77/50.46	MAYBE
199.77/50.46	
199.77/50.46	Problem:
199.77/50.46	 b(a(b(a(x1)))) -> b(a(b(b(x1))))
199.77/50.46	 b(b(b(b(x1)))) -> b(a(a(b(x1))))
199.77/50.46	 a(a(a(b(x1)))) -> b(a(b(a(x1))))
199.77/50.46	
199.77/50.46	Proof:
199.77/50.46	 Open
199.77/50.46	EOF