diff --git a/sheet.md b/sheet.md
index cc604f1..1aea835 100644
--- a/sheet.md
+++ b/sheet.md
@@ -61,7 +61,6 @@ h = ['re'] * 5                     # repeat a list
 ['re', 'bl'].index('re')           # returns index of 're'
 're' in ['re', 'bl']               # true if 're' in list
 sorted([3, 2, 1])                  # returns sorted list
-z = ['red'] + ['green', 'blue']    # list concatenation
 ```
 
 ### Dictionaries