21  ENERGY = 1.8  C14-guide
    1 A       0    2    0    1
    2 A       1    3    0    2
    3 U       2    4    0    3
    4 U       3    5    0    4
    5 A       4    6    0    5
    6 C       5    7    0    6
    7 A       6    8    0    7
    8 G       7    9    0    8
    9 U       8   10    0    9
   10 C       9   11    0   10
   11 C      10   12    0   11
   12 A      11   13    0   12
   13 G      12   14   19   13
   14 A      13   15    0   14
   15 A      14   16    0   15
   16 G      15   17    0   16
   17 U      16   18    0   17
   18 U      17   19    0   18
   19 C      18   20   13   19
   20 C      19   21    0   20
   21 A      20    0    0   21