CSS Battle - #6 Missing Slice

HTML

<div class="outer">
  <div class="inner first"></div>
  <div class="inner second"></div>
  <div class="inner third"></div>
</div>

CSS

  body {
    background: #E3516E;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .outer {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: #E3516E;
    position: relative;

    display:flex;
    flex-wrap: wrap;
    overflow: hidden;
  }

  .inner {
    width: 50%;
    height: 50%;
  }
  .first { background: #51B5A9; }
  .second { background: #FADE8B; }
  .third { background: #F7F3D7; }