d1bnla_    d1bnlb_    d1bnlc_    d1bnld_ 
d1bnla_           0.0        0.0        0.0        0.0 
d1bnlb_           0.0        0.0        0.0        0.0 
d1bnlc_           0.0        0.0        0.0        0.0 
d1bnld_           0.0        0.0        0.0        0.0