diff --git a/002-basic-control-structures/Basic control structures II.ipynb b/002-basic-control-structures/Basic control structures II.ipynb
index 303f131..16d538a 100644
--- a/002-basic-control-structures/Basic control structures II.ipynb	
+++ b/002-basic-control-structures/Basic control structures II.ipynb	
@@ -2212,7 +2212,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "metadata": {
     "hideCode": false,
     "hidePrompt": false
@@ -2235,187 +2235,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
-   "metadata": {
-    "hideCode": false,
-    "hidePrompt": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
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+   "execution_count": null,
+   "metadata": {
+    "hideCode": false,
+    "hidePrompt": false
+   },
+   "outputs": [],
    "source": [
     "# Print all the primes below 1000\n",
     "for prime in primes():\n",
@@ -2436,7 +2261,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": null,
    "metadata": {
     "hideCode": false,
     "hideOutput": false,
@@ -2978,7 +2803,7 @@
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    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.3"
+   "version": "3.7.6"
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