d1s4na_    d1s4nb_    d1s4pa_    d1s4pb_    d1s4oa_    d1s4ob_ 
d1s4na_           0.0       15.4       18.0       15.4       12.0       15.6 
d1s4nb_          15.4        0.0        8.8        0.0       10.4        0.0 
d1s4pa_          18.0        8.8        0.0        6.8        0.0        7.0 
d1s4pb_          15.4        0.0        6.8        0.0        6.4        0.0 
d1s4oa_          12.0       10.4        0.0        6.4        0.0        6.6 
d1s4ob_          15.6        0.0        7.0        0.0        6.6        0.0