cluster     1   number of spheres in cluster    21
    1   7.52900  -1.87200  17.24700   0.700    1                                
    2   6.68500   2.03600  11.45600   0.700    2                                
    3   6.33400  -3.73400  13.27800   0.700    3                                
    4   7.54500  -4.20900  12.76400   0.700    4                                
    5   6.33900  -2.77600  14.28600   0.700    5                                
    6   8.77400  -3.72900  13.23100   0.700    6                                
    7   7.56300  -2.28500  14.78000   0.700    7                                
    8   8.76800  -2.76600  14.23700   0.700    8                                
    9   6.65400   0.78800  14.79500   0.700    9                                
   10   5.72000   2.46400  13.75600   0.700   10                                
   11   7.64000  -1.24600  15.85200   0.700   11                                
   12   6.99000   2.33200  12.92300   0.700   12                                
   13   7.90400   3.55400  13.02700   0.700   13                                
   14   5.69500   1.63200  14.79000   0.700   14                                
   15   6.63900  -0.21000  15.68400   0.700   15                                
   16   4.85500   3.26300  13.49300   0.700   16                                
   17   9.92900  -2.29100  14.71600   0.700   17                                
   18   9.06100   3.24200  12.46400   0.700   18                                
   19   8.08200   3.81900  14.30000   0.700   19                                
   20   7.40800   4.63100  12.42900   0.700   20                                
   21   7.87100   0.96600  13.62700   0.700   21