Connection table for STE
  20  19  18
 C
 O
 O
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
 C
   1   2
   1   3
   1   4
   4   5
   5   6
   6   7
   7   8
   8   9
   9  10
  10  11
  11  12
  12  13
  13  14
  14  15
  15  16
  16  17
  17  18
  18  19
  19  20
   2   1   4   5   0.0   5.0
   3   1   4   5 180.0   5.0
   1   4   5   6 180.0   5.0
   4   5   6   7 180.0   5.0
   5   6   7   8 180.0   5.0
   6   7   8   9 180.0   5.0
   7   8   9  10 180.0   5.0
   8   9  10  11 180.0   5.0
   9  10  11  12 180.0   5.0
  10  11  12  13 180.0   5.0
  11  12  13  14 180.0   5.0
  12  13  14  15 180.0   5.0
  13  14  15  16 180.0   5.0
  14  15  16  17 180.0   5.0
  15  16  17  18 180.0   5.0
  16  17  18  19 180.0   5.0
  17  18  19  20 180.0   5.0
   1   2   3   4   0.0   5.0