cluster     1   number of spheres in cluster    21
    1  -4.84800  -1.37600  12.54700   0.700    1                                
    2  -8.06000   1.78700  12.52900   0.700    2                                
    3  -8.60300   1.58400  13.80700   0.700    3                                
    4  -6.78300   1.31400  12.23100   0.700    4                                
    5  -7.89900   0.90500  14.79300   0.700    5                                
    6  -4.26000   2.99000  13.98900   0.700    6                                
    7  -3.58100   0.72400  13.31200   0.700    7                                
    8  -6.07200   0.64400  13.23000   0.700    8                                
    9  -6.62700   0.43000  14.48300   0.700    9                                
   10  -3.34500   2.05400  13.68200   0.700   10                                
   11  -2.06700   2.65000  13.66700   0.700   11                                
   12  -0.72800   2.22600  13.40400   0.700   12                                
   13  -2.26000   3.98900  14.01800   0.700   13                                
   14   0.03400   4.45200  13.84400   0.700   14                                
   15  -4.81400   0.09400  13.02000   0.700   15                                
   16  -0.40100   0.93300  13.05200   0.700   16                                
   17   1.04300   5.35000  13.93200   0.700   17                                
   18   0.27800   3.14900  13.51500   0.700   18                                
   19  -1.22500   4.85800  14.09400   0.700   19                                
   20  -5.89300  -0.26800  15.36900   0.700   20                                
   21  -3.59100   4.21100  14.18800   0.700   21