1-in:  --TAGAGATTGCCCGTAGGACGGGAAGGTGTCAACGTTTTACATTTTGAAC-
2-in:  -ATTGAGATTGCCCGTAGGACGGGAAGGTGTCAACGTTTTACATTTTGAAC-
       ====================================================
2-out: --TTGAGATTGCCCGTAGGACGGGAAGGTGTCAACGTTTTACATTTTGAAC-