cluster     1   number of spheres in cluster    21
    1  21.46400   6.36200  -8.69000   0.700    1                                
    2  14.64800   8.16700  -7.99700   0.700    2                                
    3  16.65100   6.95300 -10.93300   0.700    3                                
    4  19.12800   6.28400  -7.16300   0.700    4                                
    5  16.77200   6.89800  -6.93200   0.700    5                                
    6  16.57700   4.02300  -5.25400   0.700    6                                
    7  18.10100   6.01200  -4.90900   0.700    7                                
    8  17.98000   6.39100  -6.38700   0.700    8                                
    9  19.11000   6.63700  -8.51700   0.700    9                                
   10  16.76000   7.25400  -8.29000   0.700   10                                
   11  17.35300   4.76900  -4.40300   0.700   11                                
   12  17.90500   7.11400  -9.06700   0.700   12                                
   13  17.51400   4.35800  -3.09000   0.700   13                                
   14  16.10300   2.64700  -3.53800   0.700   14                                
   15  18.27700   5.09000  -2.24900   0.700   15                                
   16  15.42200   1.59600  -2.99900   0.700   16                                
   17  15.91400   2.95800  -4.78800   0.700   17                                
   18  16.87300   3.28200  -2.62300   0.700   18                                
   19  20.21300   6.49900  -9.32000   0.700   19                                
   20  15.63000   7.74500  -8.94900   0.700   20                                
   21  17.82700   7.49400 -10.42300   0.700   21