>dna 10000,11000 sequence.masked
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNAACCTGATTTATTCCCACCTCCCCCCCAC
CTTTTATTCCTCCTTGGTTACAGAAAAGAGGTAGAATGATAATATGGTAA
CATCACTCTAAACTACTGAGTTACTTAAGTCCCTAGCTGATAAAGCCAGC
CAAGAGGTACACTTGCTCTGACCTGTCTTTTGTAAACATTATCAGTCAGA
AAATTCAGGGTCAACACTATTCAAAGATTCATTTAGCTTAACATTCTTGA
ATATTAAGCCCAAAGGAATAAGAATAAAACATTTAAATGCAAAGTAAATA
TCCTGCCATTGAAGATAAAACTTTCCTAAATATACTCAGAGAGGAGTACT
GTTCAAGCGATCAAATGGCGCAGTACACAACTTCAGCACATTATATTGAA
AATAATTTATCAAATTCCCAAAGAAGACAAATTAATGTCTCTTGCATATA
CTACTAGTAAACGTAAAGCATATCAATCTACAAATAAAAACCATTAAAGT
TTTCCCGTAGAAAGATTTTATACATCTTTTTATGCAATGATTACAGAAAA
GCTGAGCTAAAACTGGATGAGTTAAATCACAAACCTGAAACTGTGGAATC
GTCATTTCAAAGCACTTGGTCTTTACTTGGCCTGAATGATCTGCCACTTT
TAGCATCACTGCAACGTAAGGATACTTAAGAGATCTGCAAGTGTCTGAGC
TCACAGCCATACCCAGTTTCCACTGAAAATCTACAAGCTTTAATAAGACA
GGACAAAATAATACATTAGTAGTAACATTACCTGGAATGCAGATATTTAT
TCAATTTTACTGCAGTTACACTCAACTTTTAGTTTCAACGCTGGTCATAT
T