21  ENERGY = 1.5  > RA7680
    1 A       0    2    0    1
    2 A       1    3    0    2
    3 C       2    4    0    3
    4 C       3    5    0    4
    5 A       4    6    0    5
    6 T       5    7    0    6
    7 A       6    8    0    7
    8 A       7    9    0    8
    9 C       8   10    0    9
   10 C       9   11    0   10
   11 G      10   12    0   11
   12 C      11   13   20   12
   13 A      12   14   19   13
   14 T      13   15    0   14
   15 C      14   16    0   15
   16 A      15   17    0   16
   17 T      16   18    0   17
   18 A      17   19    0   18
   19 T      18   20   13   19
   20 G      19   21   12   20
   21 T      20    0    0   21