cluster     1   number of spheres in cluster    21
    1 -17.68000 -48.08400   4.49200   0.700    1                                
    2 -24.34100 -53.13700   2.68300   0.700    2                                
    3 -24.11800 -52.05200   1.83900   0.700    3                                
    4 -23.27500 -53.68800   3.39200   0.700    4                                
    5 -22.82900 -51.51700   1.71000   0.700    5                                
    6 -21.99000 -53.14800   3.26700   0.700    6                                
    7 -19.30400 -48.14300   0.28700   0.700    7                                
    8 -19.48600 -48.13500   1.66500   0.700    8                                
    9 -19.91800 -50.47300   0.24900   0.700    9                                
   10 -21.75800 -52.05800   2.42600   0.700   10                                
   11 -19.52300 -49.31100  -0.43600   0.700   11                                
   12 -19.87400 -49.28500   2.34900   0.700   12                                
   13 -20.11300 -50.45700   1.64100   0.700   13                                
   14 -20.05500 -49.29000   3.66600   0.700   14                                
   15 -19.32700 -49.30200  -1.76900   0.700   15                                
   16 -18.70100 -48.18300  -2.42400   0.700   16                                
   17 -19.68200 -50.41300  -2.58200   0.700   17                                
   18 -20.09800 -46.83800   4.36000   0.700   18                                
   19 -19.78500 -48.48300   6.08200   0.700   19                                
   20 -20.48100 -51.58000   2.34600   0.700   20                                
   21 -19.44600 -48.15200   4.66500   0.700   21