diff --git a/notebook/generators/hands_on/1_recognize_smell.py b/notebook/generators/hands_on/1_recognize_smell.py
index de84809..d6c883c 100644
--- a/notebook/generators/hands_on/1_recognize_smell.py
+++ b/notebook/generators/hands_on/1_recognize_smell.py
@@ -1,14 +1,39 @@
-for i in range(9):
-    if i % 3 == 0:
-        continue
-    print('Square is', i ** 2)
-
-for j in range(5):
-    if j % 2 == 0:
-        continue
-    print('Cube is', j ** 3)
-
-for k in range(13):
-    if k % 5 == 0:
-        continue
-    print('A' * k)
+#for i in range(9):
+#    if i % 3 == 0:
+#        continue
+#    print('Square is', i ** 2)
+
+def square_iterator(n):
+    for i in range(n):
+        if i % 3 != 0:
+            yield i **2
+
+for i in square_iterator(9):
+    print('Square is', i)
+
+#for j in range(5):
+#    if j % 2 == 0:
+#        continue
+#    print('Cube is', j ** 3)
+
+def cube_iterator(n):
+    for i in range(n):
+        if i % 2 != 0:
+            yield i ** 3
+
+for i in cube_iterator(5):
+    print('Cube is', i)
+
+
+#for k in range(13):
+#    if k % 5 == 0:
+#        continue
+#    print('A' * k)
+
+def a_times(n):
+    for k in range(n):
+        if k % 5 != 0:
+            yield 'A'*k
+
+for i in a_times(13):
+    print(i)