.stretch {
  display:flex;
  align-items: stretch;
}
.stretch .item{
  height: 80px;
}

.flex-start {
  display:flex;
  align-items: flex-start;
}
.flex-start .item:nth-of-type(1) {
  height: 80px;
}
.flex-start .item:nth-of-type(3) {
  height: 50px;
}

.flex-end {
  display:flex;
  align-items: flex-end;
}
.flex-end .item:nth-of-type(1) {
  height: 80px;
}
.flex-end .item:nth-of-type(3) {
  height: 50px;
}

.center {
  display:flex;
  align-items: center;
}
.center .item:nth-of-type(1) {
  height: 80px;
}
.center .item:nth-of-type(3) {
  height: 50px;
}

.baseline {
  display:flex;
  align-items: baseline;
}
.baseline .item:nth-of-type(1) {
  line-height: 3;
}
.baseline .item:nth-of-type(3) {
  line-height: 2;
}

.stretch, .flex-start, .flex-end, .center, .baseline {
  background-color: lightskyblue;
}


.item {
  background-color: red;
  color:#fff;
  margin: 10px;
  width: 30px;
  height: 30px;
  text-align: center;
}

.wrap .item {
  background-color: blue;
}

.wrap-reverse .item {
  background-color: green;
}