for="R55">space-around:</label>
         <input name="align-content" type="radio"  class="align-content" id="R56" value="align-content-stretch"  checked><label for="R56">stretch:</label>
      </div>
   </div>
   <div class="flex-container" id="alignContent">
      <div class="item" data-color="1bbc9d">
         <p>1</p>
      </div>
      <div class="item" data-color="2fcc71">
         <p>2</p>
      </div>
      <div class="item" data-color="3598dc">
         <p>3</p>
      </div>
      <div class="item" 