diff --git a/13/5 - Product b/13/5 - Product
index 316fe03..a11f123 100644
--- a/13/5 - Product	
+++ b/13/5 - Product	
@@ -1,4 +1,4 @@
 def prod(L):
-   for i in L[1:]:
-      L[0] *= i
+   for i in range(1,len(L)):
+      L[0] *= L[i]
    return L[0]