Sequence: TAAGAACAATAAGAACAAGAACAATAA -- Length 27
     Sequence is GOOD!
Sequence: GAACAATAAGXAATAAGAAXXAACAAGAACAATAA -- Length 35
     Sequence is BAD at 10 19 20
     3 bad positions, 8.57% of total
Sequence: ACAATAAAAGAACAATAAGAA -- Length 21
     Sequence is GOOD!