<pre class="shiki github-dark shaku"><code>// This is a JavaScript coding problem from BFE.dev /** * @param {string[][]} message * @return {string} */function decode(message) { // your code here let result = '' let i = 0, j = 0; while(i &lt; message.length &amp;&amp; j &lt; message[0].length){ result = result + message[i][j] if(i == message.length - 1){ i-- }else{ i++ } j++ } return result}</code></pre>