diff --git a/dtd.txt b/dtd.txt
new file mode 100644
index 0000000..84ea314
--- /dev/null
+++ b/dtd.txt
@@ -0,0 +1,38 @@
+>dtd
+atgatcctgtcggacgcggacatcctcgac---------cggctcgcggcgggggacctc
+---------------gtggtcgagccgctcggcgacgtcgaccag---caggtccag---
+------cccgcgagcgtcgacctacggctcggcgagcgattcctggagttccagcgcacc
+aacatcccctgcatccacccgaccgaggccgacgaggtcggcgagtacgtcactgagacc
+accgtcgacgagggc---------gacgagttcatcctccaccccggggacttcgtgctc
+ggcacgacgaccgagcgcgtcgagatcccggacgacctcgtcgcgcacgtcgaggggcgc
+tcgtcgctcgggcggctcgcgatcgtcgtccacgcctcgttgccgcacgacgaaacggtg
+ttcctgtggacgccggacgaggggttcggattctacgagatcggcgatatcgtcgaaaac
+gaacgaccggcgagagcggtcgcatttgacccgaagagcttgagagtgagcacacaccga
+gtgacggattatattacgaatccgacaaaaaagatctaccgtgtcaccctcgagtccggg
+cgagaagtgttagtgacgaaagatcacaatctgttcaccctcaacgcggacggcggtgtt
+acgcgaatagccagcgaggatgctgaagggtcccacgtgatggttccgggagttcttccc
+gcgtctccgacggaggaatcctccctcgatctgctctcgctgttagaaggggacgacgaa
+gtgattgcgtacgcgtcggacgggataggggacgttgtctggaccgacgacgtggcggag
+ccgtcacggcgtcattacgactcgcgaaatgcggcaccgctatcgtgtgtctccagtgcg
+accgctcccgaagaagcggacatcgcgttcaagcagagcgattaccgactgtcccgcaac
+ctggaattgaccccggagttcggttgggtactcggattttacatcgccgagggttccgct
+cggcggaagcaggtccagttcggaaacaaggacgacgcgtttctcgaccgggtcgaagaa
+tggttcgagggacacgacgcaagcgttcaccgacgagagggtgagaacggcgtcgagcga
+ctcacggtatgttcggcgctgtggtcgaaggtcatccgtgaactcgccgggtctggaagc
+gagaaggatattccggaccgagcgtggaactggccgactgcggtacttcgcggactacac
+gagggactcctcgacggcgatggttgccgccgagagtcgagggatacgctgtacacgtcg
+aacggctcgctcgccgacggtgcgatgtatctggccgctcggctcggactgcacagttcc
+acttacgccagagagcgcgagacttacatccccatgagcgacgtcacgacaagcgggacc
+gaacacgccgtcgataccgcgactgatccgcacaaacgcggtcagtacgttccggttccg
+agcgagctgctacacgaattgcggaaagagaccggattgacgatgagcgaggccgccgat
+gcgatgggatattcgtcgaaatcgagcgtctcaaacgtcgaaaacaacgaatacgacacc
+gtcaaacgtgagacgctccagcggttccgggaggtgtataccgataacggtgcgaatacg
+cggcgtctcgatcagatcctccgtgaagaagttcgattcgaggaagtcgtcgaagtcgaa
+gcgacggaccgtgtcgaacccacgtatgacctggaagttcagccgaacggcagaacgata
+gagaatttcctcggcgggaaaggaggtgtgttcctgtcgaacaccgccggcctgtgcgac
+cccggttat------aaggggcagatcacgctcgaactctcgaacctcggcaccgcgccc
+gtcgcgctctcgccggggatgcgcgtctcccagctcacgttcaccgagctgaagtcgccc
+gccgaccgcccgtacggcgcggagcgcgggtcgaagtaccaggaccaggacggcccgcag
+gcctcccggatcggcgacgacccggagttcgagggcgacgggagc---------------
+---------------------gcagcggggacctcgacgagcgccgccgagggcgacgac
+ggggcgaggggggaccgctcatga------------------
\ No newline at end of file