cluster     1   number of spheres in cluster    20
    1  15.59000 -10.92900  16.34300   0.700    1                                
    2  16.36300 -10.15900  15.52000   0.700    2                                
    3  15.73800  -9.16300  17.95900   0.700    3                                
    4  18.10800  -6.63800  16.61100   0.700    4                                
    5  15.28200 -10.37300  17.54300   0.700    5                                
    6  16.84000  -8.89900  15.85800   0.700    6                                
    7  16.52600  -8.39800  17.10600   0.700    7                                
    8  17.92800  -6.93200  15.13400   0.700    8                                
    9  15.73700  -6.09600  17.16300   0.700    9                                
   10  16.12900  -6.18100  19.46200   0.700   10                                
   11  19.13500  -6.58500  14.29200   0.700   11                                
   12  16.94400  -6.98900  17.44800   0.700   12                                
   13  19.72700  -7.58000  13.67300   0.700   13                                
   14  15.63400  -5.74600  18.36800   0.700   14                                
   15  17.16800  -6.80400  18.86800   0.700   15                                
   16  15.16200  -5.85400  16.16500   0.700   16                                
   17  15.99200  -5.96100  20.65600   0.700   17                                
   18  19.57600  -5.44100  14.26200   0.700   18                                
   19  17.64500  -8.32200  14.92900   0.700   19                                
   20  14.53400 -11.13000  18.42200   0.700   20