cluster     1   number of spheres in cluster    18
    1  -3.93000   2.24600  15.46400   0.700    1                                
    2  -3.43700   3.26400  14.63400   0.700    2                                
    3  -6.12000   3.23000  15.38900   0.700    3                                
    4  -6.77100   7.54700  12.20300   0.700    4                                
    5  -4.92600   8.98200  11.25500   0.700    5                                
    6  -5.29200   2.19200  15.82200   0.700    6                                
    7  -4.28000   4.27200  14.19100   0.700    7                                
    8  -5.60700   4.24200  14.55400   0.700    8                                
    9  -5.52500   7.13100  12.49800   0.700    9                                
   10  -5.26400   5.97100  13.26000   0.700   10                                
   11  -5.44200  -0.31100  16.29000   0.700   11                                
   12  -6.17700   5.28500  13.96600   0.700   12                                
   13  -4.53900   7.90600  11.97200   0.700   13                                
   14  -4.09300   5.33300  13.39800   0.700   14                                
   15  -7.35400   0.99000  16.73000   0.700   15                                
   16  -5.36500   1.01200  18.16800   0.700   16                                
   17  -6.61900   8.95800  11.26100   0.700   17                                
   18  -5.97900   1.04100  16.87100   0.700   18