d1ffvc1    d1ffvf1    d1ffuc1    d1ffuf1 
d1ffvc1           0.0        0.0        0.0        0.0 
d1ffvf1           0.0        0.0        0.0        0.0 
d1ffuc1           0.0        0.0        0.0        0.0 
d1ffuf1           0.0        0.0        0.0        0.0