line {
        background: teal;
        align-self: baseline;
      }
      .stretch {
        background: pink;
        align-self: stretch;
      }
   </style>
  </head>
  <body>
    <div class="flexbox">
      <div class="flex-start">start</div>
      <div class="flex-start big">a b</div>
      <div class="flex-end">end</div>
      <div class="flex-end big">a b</div>
      <div class="center">center</div>
      <div class="center big">a b</div>
      <div class="baseline">base</div>
      <div class="ba