cluster     1   number of spheres in cluster    21
    1   3.03500  -1.07800 -10.00500   0.700    1                                
    2   4.24300  -1.07600 -12.25200   0.700    2                                
    3   4.73000  -2.79000 -10.53300   0.700    3                                
    4   1.03600  -5.93700 -12.29700   0.700    4                                
    5  -4.09600  -2.08400 -15.71600   0.700    5                                
    6  -2.09500  -2.04300 -17.08000   0.700    6                                
    7  -4.81600  -1.42300 -16.71900   0.700    7                                
    8  -2.80900  -1.38800 -18.09900   0.700    8                                
    9   1.43900  -2.24900 -12.39700   0.700    9                                
   10  -2.73600  -2.38900 -15.88200   0.700   10                                
   11  -4.16300  -1.06800 -17.91200   0.700   11                                
   12   2.52700  -2.78600 -11.71500   0.700   12                                
   13   0.70400  -3.37500 -12.74100   0.700   13                                
   14  -0.80300  -2.95200 -14.53900   0.700   14                                
   15   3.62700  -1.92800 -11.13600   0.700   15                                
   16   2.49100  -4.12900 -11.58900   0.700   16                                
   17  -2.10400  -3.04900 -14.86900   0.700   17                                
   18  -0.45600  -3.56300 -13.39100   0.700   18                                
   19   1.30800  -4.48000 -12.26000   0.700   19                                
   20   0.03100  -2.37300 -15.23100   0.700   20                                
   21  -5.08200  -0.22700 -19.20700   0.700   21