Multiple ul with single array in ember handlebars template

Lets say I've an array with 6 items and I want print them 3 per list

Ex

//arr = [1,2,3,4,5,6];
//html
<div class="first">
  <ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
  </ul>
</div>

<div class="second">
  <ul>
    <li>4</li>
    <li>5</li>
    <li>6</li>
  </ul>
</div>

How can I accomplish that with ember/handlebars? Thanks