cluster     1   number of spheres in cluster    20
    1  18.31400  24.46400  20.17400   0.700    1                                
    2  18.23600  25.76400  20.76100   0.700    2                                
    3  17.49200  24.17500  19.02400   0.700    3                                
    4  17.36500  26.74800  20.19200   0.700    4                                
    5  20.02700  28.35900  16.11900   0.700    5                                
    6  20.16700  29.71100  16.79800   0.700    6                                
    7  19.12700  28.47600  14.88700   0.700    7                                
    8  18.77600  30.22700  17.18300   0.700    8                                
    9  17.68400  30.16200  16.10400   0.700    9                                
   10  15.61000  24.69200  17.32500   0.700   10                                
   11  17.09100  27.65200  15.83600   0.700   11                                
   12  16.56000  25.12500  18.44100   0.700   12                                
   13  16.50100  26.44300  19.06400   0.700   13                                
   14  17.66100  28.86300  15.18200   0.700   14                                
   15  15.38000  25.15900  16.08900   0.700   15                                
   16  15.79300  29.79900  18.38100   0.700   16                                
   17  14.47000  28.64000  16.59700   0.700   17                                
   18  16.97800  28.07300  17.15700   0.700   18                                
   19  15.40300  27.36100  18.73400   0.700   19                                
   20  15.58800  28.49300  17.59800   0.700   20