d1ao0a2    d1ao0b2    d1ao0c2    d1ao0d2 
d1ao0a2           0.0        0.0        0.0        0.0 
d1ao0b2           0.0        0.0        0.0        0.0 
d1ao0c2           0.0        0.0        0.0        0.0 
d1ao0d2           0.0        0.0        0.0        0.0