cluster     1   number of spheres in cluster    18
    1 -19.84100   4.27900  -6.43700   0.700    1                                
    2 -25.12400   4.72600  -3.82400   0.700    2                                
    3 -21.19200   4.37300  -6.11800   0.700    3                                
    4 -24.15400   4.48900  -4.80600   0.700    4                                
    5 -20.40600   4.03500  -8.76500   0.700    5                                
    6 -26.78600   5.13400  -5.48800   0.700    6                                
    7 -19.45000   4.09700  -7.76800   0.700    7                                
    8 -26.44000   5.03300  -4.15200   0.700    8                                
    9 -22.17100   4.31200  -7.09600   0.700    9                                
   10 -24.49700   4.56800  -6.16100   0.700   10                                
   11 -21.75300   4.15000  -8.42100   0.700   11                                
   12 -25.83400   4.91700  -6.48800   0.700   12                                
   13 -23.56800   4.36300  -7.17000   0.700   13                                
   14 -23.86900   4.23500  -8.46000   0.700   14                                
   15 -22.85600   4.10300  -9.17100   0.700   15                                
   16 -18.12900   3.97000  -8.10900   0.700   16                                
   17 -27.38400   5.25900  -3.18300   0.700   17                                
   18 -26.29200   5.03300  -7.77100   0.700   18