d4blca_    d4blcb_    d4blcc_    d4blcd_ 
d4blca_           0.0       32.0       44.0       18.0 
d4blcb_          32.0        0.0       74.0       32.0 
d4blcc_          44.0       74.0        0.0       80.0 
d4blcd_          18.0       32.0       80.0        0.0