@ legend length 2<br>@ s0 legend &quot;Hydrogen bonds&quot;<br>@ s1 legend &quot;Pairs within 0.35 nm&quot;<br>         0           0           0<br>       200           0           0<br>       400           2           1<br>
       600           0           3<br>       800           0           2<br>      1000           1           0<br>        :<br><br><br>