20  ENERGY = 1.8  1
    1 C       0    2    0    1
    2 C       1    3    0    2
    3 A       2    4    0    3
    4 G       3    5    0    4
    5 A       4    6    0    5
    6 G       5    7   18    6
    7 C       6    8   17    7
    8 A       7    9    0    8
    9 C       8   10    0    9
   10 A       9   11    0   10
   11 A      10   12    0   11
   12 A      11   13    0   12
   13 C      12   14    0   13
   14 C      13   15    0   14
   15 C      14   16    0   15
   16 A      15   17    0   16
   17 G      16   18    7   17
   18 C      17   19    6   18
   19 A      18   20    0   19
   20 A      19    0    0   20