cluster     1   number of spheres in cluster    18
    1  -4.37000   5.62100  13.52100   0.700    1                                
    2  -3.23100   6.21500  14.30500   0.700    2                                
    3  -4.98800   4.39700  14.14900   0.700    3                                
    4  -2.43600   7.23800  13.55100   0.700    4                                
    5  -4.10100   3.18000  14.12600   0.700    5                                
    6  -1.50100   8.03000  14.42300   0.700    6                                
    7  -4.77100   1.92300  14.59700   0.700    7                                
    8  -0.95500   9.26700  13.76900   0.700    8                                
    9  -5.37000  -0.46600  16.22300   0.700    9                                
   10  -0.94600  11.69600  11.99100   0.700   10                                
   11  -7.19200   1.15500  16.39500   0.700   11                                
   12  -5.45000   1.03100  18.14500   0.700   12                                
   13  -0.68100  12.27300  14.35200   0.700   13                                
   14  -2.90000  12.42000  13.25300   0.700   14                                
   15  -5.02000   2.06900  16.05000   0.700   15                                
   16  -1.98500  10.32100  13.90100   0.700   16                                
   17  -5.83500   0.93000  16.76900   0.700   17                                
   18  -1.63300  11.77800  13.40500   0.700   18