d1rm6c2    d1rm6f2    d1sb3c2    d1sb3f2 
d1rm6c2           0.0        0.0        0.0        0.0 
d1rm6f2           0.0        0.0        0.0        0.0 
d1sb3c2           0.0        0.0        0.0        0.0 
d1sb3f2           0.0        0.0        0.0        0.0