diff --git a/Chapter 8/Exercise 8.5 b/Chapter 8/Exercise 8.5
new file mode 100644
index 0000000..94918ca
--- /dev/null
+++ b/Chapter 8/Exercise 8.5	
@@ -0,0 +1,8 @@
+let val = "I love JavaScript";
+val = val.toLowerCase();
+let vowels = ["a","e","i","o","u"];
+vowels.forEach((letter,index) =>{
+    console.log(letter);
+    val = val.replaceAll(letter,index)
+})
+console.log(val);