
         !  triples are Z, A_lo, A_hi
         !  the same Z can appear multiple times if necessary

         ! H
         1 1 2
         ! He
         2 3 4
         ! Li
         3 7 7
         ! Be
         4 7 7
         ! B
         5 8 8
         ! C
      	6 11 14
         ! N
      	7 13 15
         ! O
      	8 14 18
      	! F
      	9 17 19
      	! Ne
      	10 18 20
      	! Mg
      	12 22 24

