20  ENERGY = -1.6  1
    1 G       0    2    0    1
    2 C       1    3    0    2
    3 T       2    4    0    3
    4 G       3    5    0    4
    5 C       4    6    0    5
    6 C       5    7    0    6
    7 C       6    8    0    7
    8 A       7    9    0    8
    9 A       8   10    0    9
   10 C       9   11   19   10
   11 G      10   12   18   11
   12 T      11   13   17   12
   13 G      12   14    0   13
   14 C      13   15    0   14
   15 T      14   16    0   15
   16 G      15   17    0   16
   17 A      16   18   12   17
   18 C      17   19   11   18
   19 G      18   20   10   19
   20 C      19    0    0   20