cluster     1   number of spheres in cluster    20
    1  -8.22300  10.69500  15.45700   0.700    1                                
    2  -9.10200   9.96800  16.20800   0.700    2                                
    3  -6.60100   8.93200  15.63600   0.700    3                                
    4  -8.14500   6.54800  17.93200   0.700    4                                
    5  -6.99200  10.16300  15.18000   0.700    5                                
    6  -8.77100   8.69300  16.64800   0.700    6                                
    7  -7.50000   8.20100  16.38800   0.700    7                                
    8  -9.61400   6.77300  17.76500   0.700    8                                
    9  -7.41200   5.83400  15.61700   0.700    9                                
   10  -5.12100   6.01100  16.05700   0.700   10                                
   11 -10.47700   6.39000  18.95500   0.700   11                                
   12  -7.18700   6.76700  16.83900   0.700   12                                
   13 -11.26000   7.37000  19.39400   0.700   13                                
   14  -6.15600   5.43900  15.28800   0.700   14                                
   15  -5.76300   6.57600  17.07100   0.700   15                                
   16  -8.51300   5.66800  15.10800   0.700   16                                
   17  -3.88000   5.72400  16.02300   0.700   17                                
   18 -10.57300   5.20600  19.28500   0.700   18                                
   19  -9.76400   8.13900  17.38600   0.700   19                                
   20  -6.13100  10.90300  14.44600   0.700   20