diff --git a/ch05/ex5-1.md b/ch05/ex5-1.md
index eb3a617..ab0d7db 100644
--- a/ch05/ex5-1.md
+++ b/ch05/ex5-1.md
@@ -4,33 +4,11 @@
 
 ```dart
 void main() {
-  Map<int, dynamic> movieInformation = {0: 'Star wars'};
-
-  // Add element to Map
-  movieInformation[1] = 'Empire Strikes Back';
-  movieInformation[2] = 'Return of the Jedi';
-
-  // Loop through Map
-  movieInformation.keys.forEach(
-    (k) => print('Key: $k, Value: ${movieInformation[k]}')
-  );
-
-  // Show the keys
-  print('Keys: ${movieInformation.keys}');
-
-  // Show the values
-  print('Values: ${movieInformation.values}');
+ List listMonths = ['January', 'February', 'March'];
+ listMonths.add('April');
+ listMonths.forEach(print);
+}
+```
 
-  // Remove element from map using the key
-  movieInformation.remove(0);
 
-  // Loop through Map
-  movieInformation.keys.forEach(
-    (k) => print('Key: $k, Value: ${movieInformation[k]}')
-  );
 
-  // Check if a key exists
-  print('Key 1 exists: ${movieInformation.containsKey(1)}');
-  print('Value Star Wars exists: ${movieInformation.containsValue('Star Wars')}');
-}
-```