diff --git a/doc/.~lock.pickSort.pptx# b/doc/.~lock.pickSort.pptx#
new file mode 100644
index 0000000..8e3bbae
--- /dev/null
+++ b/doc/.~lock.pickSort.pptx#
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diff --git a/doc/.~lock.tupleSort.pptx# b/doc/.~lock.tupleSort.pptx#
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index 0000000..f2e2385
--- /dev/null
+++ b/doc/.~lock.tupleSort.pptx#
@@ -0,0 +1 @@
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diff --git a/video/picksort.gif b/video/picksort.gif
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