d1rm6b1    d1rm6e1    d1sb3b1    d1sb3e1 
d1rm6b1           0.0        0.0        0.0        0.0 
d1rm6e1           0.0        0.0        0.0        0.0 
d1sb3b1           0.0        0.0        0.0        0.0 
d1sb3e1           0.0        0.0        0.0        0.0