Someone poured all the sand into one huge box, inside which he placed several partitions. Your task is to "get" the sand out of this big trap and pour it into a small bucket. What could be simpler – you think, and we hasten to object to you. The thing is that the sand is incredibly loose and can get stuck even in the smallest gap, from which it will be almost impossible to get it out. And you, in order to achieve your goal, you need all the sand without a trace. Are you ready to try your luck in this difficult task? Then go ahead! Rotate the box, pour out the sand and set new records. Good luck!