diff --git a/index.js b/index.js
index 132693a35c..88357d63db 100644
--- a/index.js
+++ b/index.js
@@ -1 +1,33 @@
-// Write your solution here!
+const cats = ["Milo", "Otis", "Garfield"];
+
+function destructivelyAppendCat (name) {
+  cats.push(name);
+} 
+
+function destructivelyPrependCat (name) {
+  cats.unshift(name);
+}
+
+function destructivelyRemoveLastCat () {
+  cats.pop();
+} 
+
+function destructivelyRemoveFirstCat () {
+  cats.shift();
+}
+
+function appendCat (name) {
+  return [...cats, name];
+}
+
+function prependCat (name) {
+  return [name, ...cats];
+}
+
+function removeLastCat () {
+  return cats.slice(0, cats.length - 1);
+}
+
+function removeFirstCat () {
+  return cats.slice(1);
+}