@Override
	public String toString() {
//		String s = String.format("%1$,.4f, %2$,.4f, %3$,.4f | ", i, o, e);
		String s = i + ", " + o + ", " + e + " | ";
		for (NeuralLink l0 : l)
			s += l0.toString() + ", ";
		return s;
	}