assi 
   (( segid "   A" and resid 21   and name  HN  ))
   (( segid "   A" and resid 30   and name  O   ))
      2.000     2.000     0.000

 assi 
   (( segid "   A" and resid 21   and name  N   ))
   (( segid "   A" and resid 30   and name  O   ))
      3.000     3.000     0.000

 assi 
   (( segid "   A" and resid 21   and name  O   ))
   (( segid "   A" and resid 30   and name  HN  ))
      2.000     2.000     0.000

 assi 
   (( segid "   A" and resid 21   and name  O   ))
   (( segid "   A" and resid 30   and name  N   ))
      3.000     3.000     0.000

 assi 
   (( segid "   A" and resid 19   and name  O   ))
   (( segid "   A" and resid 32   and name  HN  ))
      2.000     2.000     0.000

 assi 
   (( segid "   A" and resid 19   and name  O   ))
   (( segid "   A" and resid 32   and name  N   ))
      3.000     3.000     0.000