<div class="wrap">
  <p>align-items: flex-start;(一行のみ)</p>
  <div class="flex_container ais">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  <p>align-items: flex-start;(複数行)</p>
  <div class="flex_container ais">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  <p>align-items: center;(一行のみ)</p>
  <div class="flex_container aic">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  <p>align-items: center;(複数行)</p>
  <div class="flex_container aic">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  <p>align-items: baseline;(一行のみ)</p>
  <div class="flex_container aib">
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
  </div>
  <p>align-items: baseline;(複数行)</p>
  <div class="flex_container aib">
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
    <div class="flex_item">text</div>
  </div>
  <p>align-items: flex-end;(一行のみ)</p>
  <div class="flex_container aie">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  <p>align-items: flex-end;(複数行)</p>
  <div class="flex_container aie">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  <p>align-items: stretch;(一行のみ)</p>
  <div class="flex_container aist">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  <p>align-items: stretch;(複数行)</p>
  <div class="flex_container aist">
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
    <div class="flex_item"></div>
  </div>
  
</div>
.ais {
  align-items: flex-start;
}
.aic {
  align-items: center;
}
.aib {
  align-items: baseline;
}
.aib :first-child {
  display: flex;
  align-items: center;
  height: 120px;
}
.aib :last-child {
  display: flex;
  align-items: center;
  height: 80px;
}
.aie {
  align-items: flex-end;
}
.aist {
  align-items: stretch;
}
.aist .flex_item {
  height: auto;
}
.flex_container {
  width: 250px;
  height: 200px;
  border: 1px dotted black;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}
.flex_item {
  width: 50px;
  height: 50px;
  border: 1px solid black;
  background-color: #008dab;
}

.wrap {
  min-width: max-content;
  margin: 0;
  padding: 10px;
  border: 1px solid gray;
  background-color: #ddd;
}
.wrap p {
  margin: 24px 0 5px;
}
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