cluster     1   number of spheres in cluster    15
    1   2.11800  81.09300  27.41700   0.700    1                                
    2   3.77800  78.80000  27.23200   0.700    2                                
    3   4.59000  77.64500  27.11400   0.700    3                                
    4   1.78400  77.39500  27.34400   0.700    4                                
    5   3.28000  74.24700  27.10700   0.700    5                                
    6   5.81000  74.51900  26.87400   0.700    6                                
    7   2.36700  78.67600  27.33000   0.700    7                                
    8   3.94400  76.40600  27.12700   0.700    8                                
    9   2.59300  76.27000  27.24400   0.700    9                                
   10   4.39800  74.99200  27.03300   0.700   10                                
   11   6.29400  74.90100  25.49000   0.700   11                                
   12   5.62600  74.35400  24.42400   0.700   12                                
   13   7.24100  75.66300  25.33900   0.700   13                                
   14   2.10000  74.94500  27.26600   0.700   14                                
   15   1.52300  79.80200  27.38700   0.700   15