MAYBE
315.32/93.46	MAYBE
315.32/93.46	
315.32/93.46	Problem:
315.32/93.46	 a(x1) -> b(x1)
315.32/93.46	 a(a(x1)) -> a(b(a(x1)))
315.32/93.46	 a(b(x1)) -> b(b(b(x1)))
315.32/93.46	 a(a(a(x1))) -> a(a(b(a(a(x1)))))
315.32/93.46	 a(a(b(x1))) -> a(b(b(a(b(x1)))))
315.32/93.46	 a(b(a(x1))) -> b(a(b(b(a(x1)))))
315.32/93.46	 a(b(b(x1))) -> b(b(b(b(b(x1)))))
315.32/93.46	 a(a(a(a(x1)))) -> a(a(a(b(a(a(a(x1)))))))
315.32/93.46	 a(a(a(b(x1)))) -> a(a(b(b(a(a(b(x1)))))))
315.32/93.46	 a(a(b(a(x1)))) -> a(b(a(b(a(b(a(x1)))))))
315.32/93.46	 a(a(b(b(x1)))) -> a(b(b(b(a(b(b(x1)))))))
315.32/93.46	 a(b(a(a(x1)))) -> b(a(a(b(b(a(a(x1)))))))
315.32/93.46	 a(b(a(b(x1)))) -> b(a(b(b(b(a(b(x1)))))))
315.32/93.46	 a(b(b(a(x1)))) -> b(b(a(b(b(b(a(x1)))))))
315.32/93.46	 a(b(b(b(x1)))) -> b(b(b(b(b(b(b(x1)))))))
315.32/93.46	
315.32/93.46	Proof:
315.32/93.46	 Open
315.32/93.46	EOF