cluster     1   number of spheres in cluster    20
    1  -1.91200 -21.36600   9.20100   0.700    1                                
    2  -2.07200 -20.49700  10.28600   0.700    2                                
    3  -1.83500 -16.65600  16.26600   0.700    3                                
    4  -1.21300 -14.76600  14.90800   0.700    4                                
    5  -2.04200 -15.81300  17.35800   0.700    5                                
    6  -1.41800 -13.91600  16.00300   0.700    6                                
    7  -2.14700 -22.73000   9.38700   0.700    7                                
    8  -2.68800 -22.37700  11.65200   0.700    8                                
    9  -1.22100 -17.07900  13.89600   0.700    9                                
   10  -1.42400 -16.14400  15.03800   0.700   10                                
   11  -1.83600 -14.44100  17.23000   0.700   11                                
   12  -2.46200 -21.00300  11.52800   0.700   12                                
   13  -2.07800 -13.55700  18.41500   0.700   13                                
   14  -2.63600 -20.07800  12.70600   0.700   14                                
   15  -2.73200 -14.05800  19.46600   0.700   15                                
   16  -1.69200 -12.34400  18.41800   0.700   16                                
   17  -2.52700 -23.18800  10.58700   0.700   17                                
   18  -2.05400 -18.04600  13.73200   0.700   18                                
   19  -1.94600 -18.92300  12.72900   0.700   19                                
   20  -3.40400 -20.40500  13.60500   0.700   20