d1bxca_    d1bxcb_    d1bxcc_    d1bxcd_ 
d1bxca_           0.0        0.0        0.0        0.0 
d1bxcb_           0.0        0.0        0.0        0.0 
d1bxcc_           0.0        0.0        0.0        0.0 
d1bxcd_           0.0        0.0        0.0        0.0