d1qba_1    d1qbb_1    d1c7sa1    d1c7ta1 
d1qba_1           0.0        0.0        2.0        2.0 
d1qbb_1           0.0        0.0        0.0        2.0 
d1c7sa1           2.0        0.0        0.0        0.0 
d1c7ta1           2.0        2.0        0.0        0.0