20  ENERGY = 1.7  2988_ASO2
    1 U       0    2    0    1
    2 U       1    3    0    2
    3 A       2    4    0    3
    4 A       3    5    0    4
    5 C       4    6    0    5
    6 G       5    7    0    6
    7 G       6    8    0    7
    8 U       7    9   19    8
    9 A       8   10    0    9
   10 C       9   11    0   10
   11 U      10   12    0   11
   12 U      11   13    0   12
   13 A      12   14    0   13
   14 U      13   15    0   14
   15 U      14   16    0   15
   16 U      15   17    0   16
   17 U      16   18    0   17
   18 U      17   19    0   18
   19 A      18   20    8   19
   20 C      19    0    0   20