Move in the blink of an eye to a planet where only straight lines and corners are valued. Therefore, instead of the usual landscape with trees and flowers, you will be surrounded by buildings from square blocks. And this is not accidental, because on the planet In live blocks. They are almost the same in size and could not be distinguished if it were not for the image of the figures on the rectangular faces. Recently in the block world there was an extraordinary event - a portal appeared, and the inhabitants had the opportunity to travel. But it turned out that only a cube with a circle on its side can pass through the formed passage. Your task is to help him get to the round radiance.