21  ENERGY = 1.7  F
    1 C       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 T       5    7    0    6
    7 T       6    8    0    7
    8 C       7    9   20    8
    9 A       8   10    0    9
   10 C       9   11    0   10
   11 C      10   12    0   11
   12 A      11   13    0   12
   13 C      12   14    0   13
   14 C      13   15    0   14
   15 T      14   16    0   15
   16 T      15   17    0   16
   17 C      16   18    0   17
   18 T      17   19    0   18
   19 T      18   20    0   19
   20 G      19   21    8   20
   21 A      20    0    0   21