diff --git a/doc/font.svg b/doc/font.svg
new file mode 100644
index 0000000..e4e8757
--- /dev/null
+++ b/doc/font.svg
@@ -0,0 +1,463 @@
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diff --git a/doc/lines.svg b/doc/lines.svg
new file mode 100644
index 0000000..f75880f
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