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diff --git a/insertion_sort.py b/insertion_sort.py
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+# Copyright 2015 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is licensed under the terms of the MIT License.
+# See LICENSE.txt for details.
+
+def insertion_sort(xs):
+    for i in range(1, len(xs)):
+        j = i
+        while j > 0 and xs[j - 1] > xs[j]:
+            xs[j], xs[j - 1] = xs[j - 1], xs[j]
+            j -= 1
+    return xs
+
+if __name__ == '__main__':
+    import sys
+    print(insertion_sort(list(map(int, sys.argv[1:]))))