<div class="container">

  <div class="row">

    <div class="col">

      1 of 2

    </div>

    <div class="col">

      2 of 2

    </div>

  </div>

  <div class="row">

    <div class="col">

      1 of 3

    </div>

    <div class="col">

      2 of 3

    </div>

    <div class="col">

      3 of 3

    </div>

  </div>

</div>

​

​