d1boua_    d1bouc_    d1b4ua_    d1b4uc_ 
d1boua_           0.0        0.0        0.0        0.0 
d1bouc_           0.0        0.0        0.0        0.0 
d1b4ua_           0.0        0.0        0.0        0.0 
d1b4uc_           0.0        0.0        0.0        0.0