I want to float div next to each other which is having variable height. I am using display inline-block to float div next to each other, How can I remove the extra space between each block ?
(How can i remove the highlighted yellow space below)

Below is my code
body {
  font-family: "Tahoma", Geneva, sans-serif;
  font-size: 15px;
}
.block,
.block li {
  display: block;
}
.block {
  width: 960px;
  margin: 10px;
  padding: 10px;
  background: rgba(0, 80, 140, 0.3);
}
.block li {
  display: inline-block;
  vertical-align: top;
  list-style: none;
  background: rgba(255, 0, 0, 0.4);
  width: 290px;
  margin: 0 10px 10px 0;
  padding: 5px;
}
.block li:nth-child(3n) {
  margin: 0 0 10px 0;
  background: rgba(0, 255, 0, 0.6);
}
.block li:nth-child(3n-1) {
  background: rgba(0, 0, 255, 0.5);
}<ul class="block">
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />Enough content for now.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />More content please.
    <br />And some more
    <br />Enough content for now.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />Enough content for now.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />More content.
    <br />Even more content.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />Enough content for now.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />More content.
    <br />Even more content.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />Enough content for now.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />More content.
    <br />Even more content.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />
  </li>
  <li>
    Some content here.
    <br />More content.
    <br />Even more content.
    <br />Enough content for now.
    <br />
  </li>
</ul> 
    