<div class="wrap">
  <p>flex-direction: row;</p>
  <div class="flex_container fdr">
    <div class="flex_item">1</div>
    <div class="flex_item">2</div>
    <div class="flex_item">3</div>
  </div>
  <p>flex-direction: row-reverse;</p>
  <div class="flex_container fdrr">
    <div class="flex_item">1</div>
    <div class="flex_item">2</div>
    <div class="flex_item">3</div>
  </div>
  <p>flex-direction: column;</p>
  <div class="flex_container fdc">
    <div class="flex_item">1</div>
    <div class="flex_item">2</div>
    <div class="flex_item">3</div>
  </div>
  <p>flex-direction: column;-reverse;</p>
  <div class="flex_container fdcr">
    <div class="flex_item">1</div>
    <div class="flex_item">2</div>
    <div class="flex_item">3</div>
  </div>
</div>
.fdr {
  flex-direction: row;
}
.fdrr {
  flex-direction: row-reverse;
}
.fdc {
  flex-direction: column;
}
.fdcr {
  flex-direction: column-reverse;
}
.flex_container {
  width: 250px;
  border: 1px dotted black;
  display: flex;
}
.flex_item {
  width: 50px;
  height: 50px;
  border: 1px solid black;
  background-color: #008dab;
  display: flex;
  justify-content: center;
  align-items: center;
}

.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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