21  ENERGY = 0.2  F
    1 G       0    2    0    1
    2 G       1    3   20    2
    3 C       2    4   19    3
    4 A       3    5    0    4
    5 G       4    6    0    5
    6 G       5    7   17    6
    7 T       6    8   16    7
    8 T       7    9    0    8
    9 T       8   10    0    9
   10 T       9   11    0   10
   11 T      10   12    0   11
   12 C      11   13    0   12
   13 T      12   14    0   13
   14 A      13   15    0   14
   15 G      14   16    0   15
   16 A      15   17    7   16
   17 C      16   18    6   17
   18 G      17   19    0   18
   19 G      18   20    3   19
   20 C      19   21    2   20
   21 A      20    0    0   21