diff --git a/docs/assignments/week09.md b/docs/assignments/week09.md
index 6a583d5a5f8bf721b32d20b772f1face3b6ab235..dda38cfea5f08bc4d911312689dd931202451ea0 100644
--- a/docs/assignments/week09.md
+++ b/docs/assignments/week09.md
@@ -73,7 +73,7 @@ together to give you the shape that you want. I have tried multiple ways to solv
 
 #### **1ST SAMPLE**
 
-I really like the idea of inflatable origami and want to make some with baking paper. I fold some simple pleats and sealed the edges with glue. However after it expands once when I blew air inside, it cannot come back to its original shape. 
+I really like the idea of inflatable origami and want to make some with baking paper. I fold some simple pleats and sealed the edges with glue. However after it expands once, it cannot come back to its original shape. 
 
 <div style="padding:75% 0 0 0;position:relative;"><iframe src="https://player.vimeo.com/video/886931107?badge=0&amp;autopause=0&amp;quality_selector=1&amp;player_id=0&amp;app_id=58479" frameborder="0" allow="autoplay; fullscreen; picture-in-picture" style="position:absolute;top:0;left:0;width:100%;height:100%;" title="IMG_2598"></iframe></div><script src="https://player.vimeo.com/api/player.js"></script>