diff --git a/sketch.js b/sketch.js
index aa547bd..2f22ba0 100644
--- a/sketch.js
+++ b/sketch.js
@@ -1,13 +1,13 @@
 function sum(a, b) {
+  // failiure
+  a = a + b;
+  
   return a + b;
 }
 
-function prod(a, b) {
+function product(a, b) {
+  // success
   return a * b;
 }
 
-
-module.exports = {
-  sum: sum,
-  prod: prod,
-}
+module.exports = {sum: sum, product: product};