cluster     1   number of spheres in cluster    20
    1  -2.00800 -21.29800   9.15500   0.700    1                                
    2  -2.12300 -20.41400  10.23300   0.700    2                                
    3  -1.80100 -16.63800  16.22100   0.700    3                                
    4  -1.16300 -14.71300  14.90000   0.700    4                                
    5  -2.04100 -15.81300  17.32200   0.700    5                                
    6  -1.40400 -13.88700  16.00500   0.700    6                                
    7  -2.25100 -22.65800   9.36300   0.700    7                                
    8  -2.70000 -22.27400  11.64100   0.700    8                                
    9  -1.12900 -17.00400  13.85700   0.700    9                                
   10  -1.36400 -16.09400  15.01100   0.700   10                                
   11  -1.84500 -14.43500  17.21500   0.700   11                                
   12  -2.46800 -20.90400  11.49300   0.700   12                                
   13  -2.11700 -13.55800  18.40400   0.700   13                                
   14  -2.59400 -19.96900  12.66900   0.700   14                                
   15  -2.76200 -14.06100  19.45700   0.700   15                                
   16  -1.74900 -12.34200  18.41600   0.700   16                                
   17  -2.58800 -23.10400  10.58300   0.700   17                                
   18  -1.98300 -17.93800  13.66800   0.700   18                                
   19  -1.90300 -18.81900  12.66800   0.700   19                                
   20  -3.32500 -20.29000  13.59900   0.700   20