199.92/50.74	MAYBE
199.92/50.74	
199.92/50.74	Problem:
199.92/50.74	 b(b(b(a(x1)))) -> b(a(a(b(x1))))
199.92/50.74	 b(a(b(a(x1)))) -> a(a(a(b(x1))))
199.92/50.74	 a(a(b(b(x1)))) -> b(b(b(a(x1))))
199.92/50.74	
199.92/50.74	Proof:
199.92/50.74	 Open
199.92/50.74	EOF