sentences:  With enough pieces, virtually any structure imaginable can be constructed.Two of the most popular complex structures are the 2×2×2 cube which is a perfect cube with each face made of 4 pieces (all in all, 24 pieces) and the Star structure, which is made of 6 cubes attached in a single-cube sized common centre (all in all, 30 pieces).Several computer applications exist to aid in the process of designing large structures and finding solutions for them automatically.