d4tf4a2    d4tf4b2    d3tf4a2    d3tf4b2 
d4tf4a2           0.0        0.0        0.0        0.0 
d4tf4b2           0.0        0.0        0.0        0.0 
d3tf4a2           0.0        0.0        0.0        0.0 
d3tf4b2           0.0        0.0        0.0        0.0