but you can create a Shakespeare to what are diplomacy book and everything else in between by different combinations of letters. That is exactly the point really with these interconnected systems. Your building blocks may be very few, but the way those building blocks are interconnected and interdependent may create a different situations and that has serious implications really in what the way we think about water. So let's go think about water. So let's go there here. So I'll start with this many phases of water crisis. If you think about it really what is water crisis? What is crisis really if you think about you and they will tell you that if you have 20 liters of water per person per day from an improved source, you have access to water. That's the standard definition and that definition is used globally. Based on that definition, there are about 760 million people who does not have access to water. So this is what we're trying to do with this. These are our SDG. Now if you think about this