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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@ I am currently very interested in the solution of nonconservative hyperbolic
 systems, such as the acoustic equations derived in [1]. The main
 file here implements the primitive centered scheme (PRICE) from [2].
 
+## example output
+
 ### t = 0.104 sec
 
 ![res104](https://github.com/zgxn/acoustic/blob/master/img/res104.png "image")