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\ No newline at end of file
diff --git a/books/1-3/index.json b/books/1-3/index.json
new file mode 100644
index 0000000000000000000000000000000000000000..3b7daf64cb8fedd25b9550b6f353c7bfe836bb2e
--- /dev/null
+++ b/books/1-3/index.json
@@ -0,0 +1 @@
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diff --git a/books/3-4/index.json b/books/3-4/index.json
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index 0000000000000000000000000000000000000000..d705de40d71eb057e390401aacaae35e80fa1709
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diff --git a/books/3-6/index.json b/books/3-6/index.json
new file mode 100644
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diff --git a/books/3-7/index.json b/books/3-7/index.json
new file mode 100644
index 0000000000000000000000000000000000000000..8044c1287d7273b04cdbc26468a81e55b496a1ae
--- /dev/null
+++ b/books/3-7/index.json
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diff --git a/books/4-4/index.json b/books/4-4/index.json
new file mode 100644
index 0000000000000000000000000000000000000000..ed1202d3d44e609ef73b984056990d756d67da99
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diff --git a/books/8-4/index.json b/books/8-4/index.json
new file mode 100644
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diff --git a/books/8-9/index.json b/books/8-9/index.json
new file mode 100644
index 0000000000000000000000000000000000000000..06b189a517ec8ca44254643011bc3000db2bdcab
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diff --git a/books/9-4/index.json b/books/9-4/index.json
new file mode 100644
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