: sideways-rl;
      }
      div.spacer {
        width: 15px;
        height: 15px;
        background: purple;
      }
    </style>
  </head>
  <body>
    <div class="flexbox"><div class="a"></div><div class="b"/></div>
    <div class="flexbox"><div class="a"/><div class="c"/></div>
    <div class="flexbox"><div class="a"/>
      <div class="flexNone"><div class="spacer"/></div>
    </div>
    <div class="flexbox"><div class="b"/><div class="c"/></div>
    <div class="flexbox"><div class="b"/>
      <div 