| model 1, 2, 8, 11, 13, 16, 17, 18, 19, 20 
 | 
| >strand_A gGCAGAUCUGUAAUAGAACUGCC
 (((((.(.........).)))))
 | 
| model 3, 5, 6, 7, 9, 10, 14, 15 
 | 
| >strand_A gGCAGAUCUGUAAUAGAACUGCC
 (((((.(((.....))).)))))
 | 
| model 4, 12 
 | 
| >strand_A gGCAGAUCUGUAAUAGAACUGCC
 (((((.((.......)).)))))
 |