d1bxba_    d1bxbb_    d1bxbc_    d1bxbd_ 
d1bxba_           0.0        0.0        0.0        0.0 
d1bxbb_           0.0        0.0        0.0        0.0 
d1bxbc_           0.0        0.0        0.0        0.0 
d1bxbd_           0.0        0.0        0.0        0.0