cluster     1   number of spheres in cluster    20
    1  12.00300   1.17700  46.56700   0.700    1                                
    2  12.86500   1.13500  45.30900   0.700    2                                
    3  11.99800   0.90100  44.07100   0.700    3                                
    4  12.82800   0.58200  42.82600   0.700    4                                
    5  13.04300   1.82800  41.96400   0.700    5                                
    6  13.58900   1.45200  40.58500   0.700    6                                
    7  12.60500   0.90600  39.76000   0.700    7                                
    8  12.66800   0.95500  38.36300   0.700    8                                
    9  13.71100   1.55800  37.65700   0.700    9                                
   10  14.40900   0.54700  36.73800   0.700   10                                
   11  15.86300   0.94500  36.42800   0.700   11                                
   12  16.72200   0.99600  37.69500   0.700   12                                
   13  18.21000   0.97200  37.36600   0.700   13                                
   14  18.91300  -0.11200  38.17400   0.700   14                                
   15  18.64900  -1.46700  37.52600   0.700   15                                
   16  19.52400  -2.56600  38.11900   0.700   16                                
   17  18.99600  -3.95400  37.71900   0.700   17                                
   18  19.21200  -4.28900  36.22500   0.700   18                                
   19  18.36800  -5.01000  35.66000   0.700   19                                
   20  20.21800  -3.83000  35.67400   0.700   20