The sequencing resulted in a total of 2 distinct strands:

Strand 1 (length=21)
atctctctctctctctctcta
---------------------
atctctctctctctctctct
 tctctctctctctctctcta

Strand 2 (length=19)
ctctctctctctctctctc
-------------------
ctctctctctctctctctc