diff --git a/iterator_adaptors.htm b/iterator_adaptors.htm
index 5254c53..d7f9019 100644
--- a/iterator_adaptors.htm
+++ b/iterator_adaptors.htm
@@ -389,6 +389,10 @@ int main(int, char*[])
   return 0;
 }
 </pre>
+This output is:
+<pre>
+2 4 6 8 10 12 14 16
+</pre>
 </blockquote>