diff --git a/package-lock.json b/package-lock.json
index 48a7f16..607514a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
       "devDependencies": {
         "@types/chai": "^4.3.4",
         "@types/mocha": "^10.0.1",
+        "@types/node": "^22.7.5",
         "chai": "^4.3.7",
         "mocha": "^10.2.0",
         "ts-node": "^10.9.2",
@@ -97,7 +98,6 @@
       "resolved": "https://registry.npmjs.org/@types/node/-/node-22.7.5.tgz",
       "integrity": "sha512-jML7s2NAzMWc//QSJ1a3prpk78cOPchGvXJsC3C6R6PSMoooztvRVQEz89gmBTBY1SPMaqo5teB4uNHPdetShQ==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "undici-types": "~6.19.2"
       }
@@ -1022,8 +1022,7 @@
       "version": "6.19.8",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
       "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "node_modules/v8-compile-cache-lib": {
       "version": "3.0.1",
@@ -1218,7 +1217,6 @@
       "resolved": "https://registry.npmjs.org/@types/node/-/node-22.7.5.tgz",
       "integrity": "sha512-jML7s2NAzMWc//QSJ1a3prpk78cOPchGvXJsC3C6R6PSMoooztvRVQEz89gmBTBY1SPMaqo5teB4uNHPdetShQ==",
       "dev": true,
-      "peer": true,
       "requires": {
         "undici-types": "~6.19.2"
       }
@@ -1877,8 +1875,7 @@
       "version": "6.19.8",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
       "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "v8-compile-cache-lib": {
       "version": "3.0.1",
diff --git a/package.json b/package.json
index 402d5e1..9a99052 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "devDependencies": {
     "@types/chai": "^4.3.4",
     "@types/mocha": "^10.0.1",
+    "@types/node": "^22.7.5",
     "chai": "^4.3.7",
     "mocha": "^10.2.0",
     "ts-node": "^10.9.2",
@@ -20,4 +21,4 @@
   "description": "Simple coding challenge for Evie!",
   "main": "dist/index.js",
   "author": "Evie Networks"
-}
\ No newline at end of file
+}
diff --git a/src/index.ts b/src/index.ts
index 946d794..a9b3e14 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1 +1,27 @@
 // The CLI entry point should live here!
+import { reverseSentence } from './reverse';
+
+// This line is used to receive the arguments from the command line + skipping 'node' and the script path
+const args = process.argv.slice(2);
+
+// The first argument is the sentence and any other arguments are options.
+const sentence = args[0] || '';
+
+// Check if the user wants to reverse words or letters
+const reverseWords = args.includes('--word');
+const reverseLetters = args.includes('--letter');
+
+// Try to reverse sentence based on the options and catch if theres any error
+try {
+    const result = reverseSentence(sentence, reverseWords, reverseLetters);
+    console.log(result);
+} catch (error) {
+     //Narrow down to handle errors as typescript error
+    if (error instanceof Error) {
+        console.error(error.message); 
+    } else {
+        console.error("An unknown error occurred.");
+    }
+}
+
+
diff --git a/src/reverse.ts b/src/reverse.ts
index 6d2dbb5..7e9d41a 100644
--- a/src/reverse.ts
+++ b/src/reverse.ts
@@ -3,5 +3,31 @@ export const reverseSentence = (
   reverseWords: boolean,
   reverseLetters: boolean
 ): string => {
-  throw new Error("Not implemented yet!");
+  try {
+    // Split the provided sentence into an array as soon as space found.
+    let words = sentence.split(' ');
+
+    // This reverse the order of the words  
+    if (reverseWords) {
+      words.reverse();
+    }
+
+    // This reverse the letters in each words
+    if (reverseLetters) {
+      words = words.map(word => word.split('').reverse().join(''));
+    }
+
+   // Join all the words back together and return the result.
+    return words.join(' ');
+  } catch (error) {
+    //Narrow down to handle errors as typescript error
+    if (error instanceof Error) {
+      console.error('An error occurred:', error.message);
+      throw new Error(error.message || 'Failed to reverse sentence.');
+    } else {
+      console.error('An unexpected error occurred:', error);
+      throw new Error('Failed to reverse sentence due to an unknown error.');
+    }
+  }
 };
+